First corel drawing

The first thing I do with Corel which Im learning how to use...(except the link thing but that wasnt fully drawn in corel) I've figured out 3 things... 1: I suck at buildings, at which I have to focus more, 2: It's taking me a hell of a lot time to color this in corel since Noob here... and 3:Inking digitally sucks it's like Paint but with pressure...