Shaving my armpits, I am new to this, so explain to me like a child?

yes any razor will do. disposable razors do work just as well. you probably won't bleed, but if your not careful you might, don't worry though. you can use normal soap instead of gel. you can get disposable razors in packs that aren't expensive and they work well, and you can put your razor anywhere, in a cup, in a case, anywhere. hope this helps, good luck.