Well, I didn't even know this sub existed, I don't have a stutter or anything but, I have a friend who gets bad sometimes. I guess my advice to this would be practice as much as you can. What could also help is getting the crowd to sing/rap along so if you do stutter a bit you can get back in it with their help. As far as the whole music thing goes, I think that'd be best for you to decide, you know yourself and how well you can do it much better than us strangers.