I used to use the Sony software, but I prefer Audition now. It will get rid of that hiss, but the best way is to get your mic isolated and some distance from the camera mechanisms. I use lav's whenever possible, but when I have to use a shotgun, I have a mount that gets the mic about six inches away from the cam and a shock mount that cost about fifty bucks. The cheap shock mount that came with the shotgun mic was useless and we'd get that terrible rumbling noise (from the camera motor).
videouniversity.com might be a resourse for audio how-to. And try Google. You can find nearly anything with Google. And Videomaker magazine occasionally runs some good basic audio articles - every few months or so. Check your back issues.