MAKEUP ADVICE NEEDED!

I really want to contour but I don't think I'm doing it the right way for my face shape.. 
Can anyone give me some pointers for a square/heart shaped face with a strong jaw? 
I want to make my nose look more petite with some subtle contouring too. I compare it to squidward's because it's kinda longish and been broken a few times lol 
when I try to follow YouTube videos it always looks like I'm a man in drag 💀 
HELPPP PLEASE 🙏🏼