Why are you doing a youtube channel? First decision, for sure. Are you doing it because you simply enjoy making the videos and sharing your experiences or are you desiring to build a large audience with the intention of eventually monetizing your channel? Entertainment or education, both, or really don't care? Do you even want a large audience? "A lot" of work and time required with a larger audience because they want that constant engagement, but do you really want to become that consumed by your channel? I had a large youtube channel and ended up deleting it because it became a job, all of my free time invested in that channel, now much better off with a very modest "post videos at my leisure" channel simply because I enjoy making them whenever that mood or notion strikes me. A big channel will become an everyday thing....do you really want that?
Cameras? The one I use the most "hands down" is the Coolpix W300, no fisheye, good audio quality, fits in a pocket, can be mounted on a harness or just about anywhere with the right adaptors, it's HD capable, can be tripod mounted, good zoom quality, waterproof, and reasonably priced. I never leave home without it but just don't make near as many videos I use to. I'm also a photographer with boatloads of cameras and gear so for me to be using the W300 I think that speaks volumes.
OH, and one last thing, do you just want to be yourself or do you want to become a character actor with a lot of catch phrases, etc.?