This looks a lot like my first attempt also.
So here are some things I'd look to in the future.
Add some variety in the plant life. Maybe a couple of different colors of grasses, some clumps, maybe some long grasses or bushes. The rocks are very high contrast, should maybe be toned down a bit. Also, don't be afraid to add some colors to the stone. Drybrush some browns or greens there. As for what you have there, everything is well done. I don't see anything there that I would do differently, just commenting on some things that I would add, and that comes with experience.
Like I said, my first terrain looks pretty much like that. Actually, yours looks a bit more advanced than my first piece, so kudos to you.