Well first of all welcome, you're in the right spot if you have wisps--as for your past hair styles, what happened in the past stays in the past, and if, as it sounds, you have mpb--it is in the past no matter what you do. There's nothing at all wrong w/ mpb, it's how you handle it. Most of us have shaved, some, including me, had a buzz time. But, in the end most wind up shaved, and then the overwhelming comment is, and my bet is it will be with you, "Why did I wait so long?"
Shave it, you've got the itch, because you're here not at Hair Club--and that's very smart. So clipper it to as short as possible, get a razor, new blade, good shave creme gel or whatever and get rid of the wisps--I can picture them now. Lots of us had those things, and the feeling of liberty and freedom when you get rid of them and have a clean scalp is just one of the most memorable feelings. Join up, clean up, be SLY.