read some actual beginner guides mate

i found these few keywords in your post and i really suggest you spend 2 hours and read something before asking questions like which protein to take, lose fat gain muscle at the same time, and muscular but not too big kind of bull shit

There are programs like 3 days full body, stronglift, PPL, 5/3/1, PHAT and others.

just choose one that you like and start lifting