Yes, yes you should. Most of these big flourishes that you see guys like Dan and Dave doing are based off of the small one handed cuts. When you learn the cuts your hands learn flexibility and you get used to I guess "flourishy style" for lack of better words. Hope that helps.
Definitely should. Some basics are the Charlier (absolutely necessary, learn that first), Thumb cut, Scissor cut, and the Revolution cut. I think these can all be learned on Genesis v1 by Andrei Jikh. Hope that helps, good luck with it! -Kyle