I've been recording for a while and I always have one problem, the mic records at different sound levels, so sometimes the singing is barely audible, but at other times the voice is blaring loud. Can you level the sound of the voice?

I have two questions:

1: Can you level out the sound on Audacity? Cos sometimes the voice is loud and other times the voice is barely audible

2: Also, is there a way to take off the annoying wind of the 'f's, 'p's, and 's's ? that whooshing sound is annoying ! Thanks a lot ^^