The mechanics of recording are pretty simple. the audio input on your computer needs to get hooked up to the two RCA plugs from your amplifier. There's just a ton of stuff out there you can google on.I have a few web pages of my own that may be worth a click.
http://dvautier.home.comcast.net/audio/audio.htm
And another which talks more about LPs
http://dvautier.home.comcast.net/lp/lp.htm
good luck and good recording.