Pls help me with French class work!

Ineed some body can answer to me this qs

Any french speakers? i need some . how would i say 'my oldest brother is very tall, interesting, and good at drawinng.' in french? would it be: mon (i don't know the french word for oldest) frère est très grand, intéressant, et bon à dessin. also, how would i say 'my dad is good at his work' in french?

Est-ce que tu vas à la bibliothèque? pourquoi? (2 points)