Hey man, I just subbed, and it seems like you need some help with what direction to take your channel in. First you need to ask yourself if you want to make money off of your channel- if so, then you can't post any copyrighted music, like I do on my main channel. If you don't, then you can use any music your heart desires. If you want to make money, which I assume you do, then you should look into copyright-free music, like
http://incompetech.com/
Once you've decided if you want to use copyrighted music, you should do a few short videos before you get stated on any big projects. By short video, I mean like this one I did about a year ago-
https://www.youtube.com/watch?v=7hxU31e7Kx4
Or my latest Christmas Special-
https://www.youtube.com/watch?v=hV6Grialq9s&list=UUb8ifysTZmhMuj317PH1iGg
And watch the big Youtubers to get inspired.
Work on some shorts, try some vlogs (just talk about your life) and then you can start on something bigger.
Just my advice.