I'm afraid I am an amateur artist, but I do see this as a pretty good attempt at a My Little Pony. Rarity, in this she looks like a G1 or G3 pony. I don't know what you were going for, but overall, it works. Are you ready for some criticism?
The fore-legs are too straight. Her horn is on the top of her skull when it should be on her forehead. The eyes are too circular, they are not roughly egg/almond shaped like Rarity's.
But, keep working at it, and soon you'll be drawing like a BOSS! Keep up the good work.