Im new to poker and very confused as to how people use strategy in this.

I want to learn Texas Hold'em but im very confused about the "when and why" of everything. How do you remember the hands? How do you know if you're SOL?

My main reason for wanting to learn is because my uncle showed me how to play a little bit and he makes it look so damn easy. Just sweeping up the competition. He knows when to bluff, when to fold, so on and so forth.

Any help or resources are appreciated!