You’ve definitely got a good base to work off with your models.
The best thing I could say to you is check out @voxel_pirate’s exceptionally helpful guides and tips.
Check out the model’s that we have seen in the livestreams for inspiration.
In regards to the triceratops … I’d say you definitely need some more colours in there for the … hide? … skin? … as at the moment it’s a rather large green block!
Keep at it though, perseverance is king!