If we're talking practically, these terms mean nothing. People can't be divided up so easily.

Core concepts are mostly true but every woman is different. But it is a good start that you are aware of it.

Alpha are strong masculine men that fuck all the women.

Betas are weak nerdy effeminate guys who are attract only the most desperate women, if any at all.

yep they definitely exist

Seems more like confident man vs Insecure faggot again.
You could be alpha and a nerd into computers and all sort of other shit if you truly were confident in what you do and believed in yourself and have the ability to lead and inspire when needed to.
Masculinity though could be linked to high testosterones. Working out and taking care of yourself is the key.