Hi ,
As this thread is showcasing Fan Art made by you, I have moved it to Fan Art.
Also, this actually looks pretty good, but I'd suggest finding better renders where the edges aren't as rough. Rarity and the center divider both look really edgy. Fluttershy's quality is the quality you should aim for.
I do like the composition though, and the blurred background is an excellent effect that adds depth. I do suggest playing around with the sizes of your renders though; it might look better if you make them larger.
Keep practicing! You have a lot of potential.