While there are some problems-me not knowing how to blend the bits used for the ground togeather being one-I still think it’s not bad for a first attempt.
But hey, that’s for the eye of the beholder to decide.
Looks good, the lighting looks a bit off, though. The LEGO bits look too bright and there isn’t much contrast from shadows. Not bad, though, just work on adding some nice dark shadows! Keep it up!