Requisiten for help! (: I really need it, seriously.

First of all, I've had the same Youtube name for a very long time & I do not like it. XxRedBaby. I want to make a new account w/ another name. I'm not sure what to make it as. Any suggestions?

Next; & my main question. What should I Upload Videos about? Like, I'm not sure how to, let's say, make a Tiva video using clips. I also do not know how to my song lyric videos, either. So, what should I do? Can anyone help me w/ making videos?

Thankies(: I've been needing this help for a while.