I want to learn how to make AAA indie game with realistic Mechanisms

Hello, I am new in unreal engine and i want to work on an AAA Indie horror game with high quality but i have problems in finding resources with high quality on youtube and I want to make things profissionally and I want a profissional person who worked on previous projects to help me make these mechanisms.

I think starting with smaller, modular systems like inventory or movement is a great approach. Focus on one mechanic at a time and build from there. Also, study how AAA games structure their gameplay loops—it helps a lot.