How to say "Do you think he slept last night?" In korean "지난밤 그가 잤을까요?" Is this right?

오늘 나는 요리하고, 청소할 거예요. Today I'm going to cook and clean.

이거 빌릴 수 있어요? Does this make sense?

남자친구는 집에 가면, 나 슬플 거예요. If my boyfriend goes home I'll be sad.

나는 그리는 것을 잘해요 그렇지만 늘고 싶어요. I'm trying to say "Im good and painting but I want to improve." This is the longest sentence I've ever tried to make. lol

나는 책 읽는 것을 좋아해요. "I like to read books." Is what I'm trying to say????

"나는 잘 못 싸우어요 or 나는 싸우를 잘 못 해요" I'm learning how to say to be good/bad at something, I understand how to use verbs that end in 하다 but for words that end in 다 do you just put 잘 or 못 in front of the verb? The sentence in the title is suppose to say "I'm not good at fighting" which one would be correct? Thanks.

"나는 잘 가르치어요." Is this how you say "I teach well"? I'm confused.

"영화 보고 싶어요 그리고 피자를 먹어요." Does this make sense?