What do I need to do if I want to record my songs on the computer?
A microphone, and a recording program, like audacity. Just search it on google.
I got a $10 usb mic from Quill office suppliers, and audacity as freeware. It's far from ideal but it's so much easier than using an old cassette 4 track for scratch demos. For electric demos with fx, I have a podXT which you can run a guitar straight into.
1/4 converter plug, and a recording program, and ASIO dirver
you need to read the stickies in the riffs and recordings forum.