The first advice I would give to any new writer is to do just that; write. This is my own biggest problem as well if not the greatest foe to my own writing. So how can I give you advice on how to solve it when I myself haven't. Well, let's see.
I think the first part is to not let oneself rationalize away why this happens. It happens because we either have to do something important instead or because we choose to do something we want to do instead or we simply procrastinate. It is usually the last part, for me anyway. I think that the idea of the writer's block is silly. The reason for this is because even though inspiration doesn't come on demand, which I am aware of that doesn't mean it will come if you don't engage with your writing either.
This deserves its own paragraph because I think it is important. Let's say you have an idea for a story. Then I think that you no longer need any more inspiration. As fast as you have your idea you can develop it further because you have something concrete to go on.
So that covers the inspiration part of writer's block. Now, I am not trying to promote some e-celeb here. This guy, https://www.youtube.com/watchv=U4Ue08j1PG8&index=35&list=RD6frTFL27mnU, isn't our guy either but his video covers this topic among others on his channel well. Therefore I don't see a problem with referencing his videos. I will probably be referencing to different sources a lot in the future.
But there are two other parts on why writing is difficult to get into. Again, I use myself as the norm here be aware of this when I make generalizing statement like this.
The first one is that when you are unused to writing at all, you have a hard time formulating yourself especially if English isn't your first language and then you have to worry about spelling too. I can recommend anyone who has the latter problem of having english as their second language to use free spellchecks such as Grammarly (www.grammarly.com), as I do. It spellchecks your work and is quite easy to use. For those of you who have English as your mother tongue but have problems formulating yourself. While it is true that if you stay at it you will eventually learn how to formulate yourself more elegantly there are ways to speed up that improvement process. One thing you can do, as anybody else can as well, is to polish your old grammar with videos such as these: https://www.youtube.com/watch?v=fkooLJ9MWVE.
Now to the last part on how to get started. Let's say I were to write down everything that comes to mind. Here is an example of how that would look like.
Roseluck picked up some poison jokes. Wrapped them together in a newspaper by rolling it into a cigar. Then spike appeared out of nowhere by green flame.
”Spike lit dis sheeeiit up, mah nigga,” said Roseluck.
Spike began crying incoherently as he breathed out flames that consumed the tip of the newspaper cigar.
Roseluck inhaled the blue fumes coming from her newspaper tube. Her eyes got a case of bad derpy and she wobbled around a bit before falling over.
The inebriated mare told Spike: ”Good shit, Spike.”
A large can of oil showered the baby dragon. Throwing the can away, Spike the proceeded to use ember on himself setting the oil on fire.
Next thing he knew he appeared in Celestia's throne room.
”Spike, how glad I am to see you, nigga. Here I need you to lit my sheeit,” Princess Celestia said.
Now, while this might be entertaining at first to write like this. It can also come out as horrible trash and will be boring after a while. Again using myself as an example, we tend to do more extreme things in stories that go nowhere just for something to happen.
So okay, this kind of story isn't why we want to write. We want to write something better, not something extreme. Now consider this example.
Aurora Frost was a grey-blue bat-pony mare with a marine blue mane. It was cut so that it had three distinct bangs that rose off her head and left her forehead uncovered. This hairdo looked like something any male non-main anime character would be jealous of. She had a pearl necklace which was unique for its kind since its inventor had no taste what so ever. Instead of spherical pearls they were cubes. The jacket she wore was red and it covered her forehooves, which hems were folded so that she would not step on the jacket when she walked. The arms were too long but that was the intention of the fashion designer.
While character description can be utilized to make great stories, this is still not what we wanted. It is boring. Our potential readers won't trust us to become more interesting than this or that the character's look is going to matter in the story at all. So we want to infuse some meaning in our story or some kind of point. Should we then begin with the plot of the story? Yes and no. I think that for a newcomer to the writer's guild they should get started on the writing process before the plot crafting process as a way to gain experience in writing scenes. Therefore, I think, that a new author should begin with writing short stories. Something under a thousand words or about it anyway. So there are many ways to create a short story. One can think up a ridiculous scenario and then just play it out straight. Here is an example of that.
Tears poured from Twilight's eyes as if the tears were sweat and she was John Bojega. The bench beneath her was now stained in it that there was a large dark spot over the entire surface.
A tiny pink hoof petted her soothingly. Twilight turned her gaze towards whoever it was that petted her. She was meet with the sad expression of a little pink filly with blonde hair.
”Don't be sad miss Twily. I am sure you will leave magic kindergarten soon.”
The end.