How do you be everything?

Answer 1

You can't. If a specialist is someone who knows more and more about less and less until finally they know everything about nothing, then a generalist would be someone who knows less and less about more and more until finally he knows nothing about everything.

Find one thing you are good at, and be that one thing. If you should come to master it and be bored, then worry about branching out. (But who has mastered even one thing?)