How do I train this dinosaur?

How do I train my dog to not bite all he sees are on the floor or at a table he can reach, and to not poop or pee everywhere?? I mean I love him so much, he's nearly 3 and a half months but damn! I be cleaning all day and night because of his mess! I can't think of ways how I can train him to just poo and pee in one area and not bite things 🥹 last photo is the mess he left after I slept for 3hrs.