Just a few questions about Let's Playing?

[Jade]

I am a person, who is hoping to start a Let's Play, but I am stuck on a few things, and need advice.
For the note, I am not doing it just to get subscribers or anything, I simply need something else to do other than schooling. School, don't get me wrong, I'm happy to educate myself, but, it's just... The school I personally go to is so crappy I've been in a depression ever since I started.
It seems like the only thing I did, was watch other's LP games and I enjoyed it so very much. It was a thing I was putting off until I was older so that I had an adult voice. But it's safe to say that I need a hobby to get my mind off things that depress me.

But, I'd love to have an audience. I'd love to be able to connect with people who I feel enjoy what I do, because it's a nice feeling to be appreciated. And, if a game I LP gives options to nickname characters or something along those lines, I'd love to get viewers to interact and give out ideas..

(1) How do I get an audience, even if it is just a small one?

(2) I am only 13, I was keeping LPing as a thing for when I was 16, but I need a distraction now. Would my age affect my overall success?

(3) How does one go around to choosing a game to LP?

(4) Is a Dazzle a mediocre or good recording device?

(5) I am a normal, free Youtube user. Is there a limit to the length of videos I can upload? What is it?

(6) Any other little tips?

When I do receive my dazzle in the mail, I plan to start with a small project. My Youtube username is ShiiLemon, and if you could just check up on me every now and then and give me some constructive criticism, that would be very much appreciated.

Thank you, I appreciate your answers.