BlackHeart
Plantera
If by noob you mean simple to learn, you're on the right track.
Otherwise, it's important to remember that different champions have different mechanics to be mastered.
And mastering mechanics has to go along with knowledge of matchups against different champions (Don't pick a matchup you don't know well in ranked)
otherwise you'll still be losing lane.
Different champions have different skillcaps, so don't be afraid to main certain champions.
I like caitlin, I am good with caitlin and I mostly play caitlin (after teemo) but I like try diferent champions from time to time in unranked games. It's wrecking the competition but it is also fun to try something new.