i searched kurumu and tsukune and got a spoiler >_< ( i'm only three volumes into season 2 but then again tsukune turning into a real monster was bound to happen) -- "Kick logic out and to the impossible!" -Kamina, Gurren Lagann
Well there is nothing wrong with being a beginner. You might get so "oh cool" or "good work" comments from people too.
But without telling us what you actually did in the description or showing us what the starting image looks like I cant really critique and help you grow as an artist.
Believe me colorists are the most wonderful people in the world and I respect them more than most other types of artists, if you want to learn how to color I encourage you to keep down that path. They are like lead singers in bands, they get all the girls and fame (even if other people do the sketching and lineart)