recording stuff for an amateur

I want to record a bit, but I have zero experience. I am not very good with computers and I don't want to spent too much money (40/50 bucks) I don't plan to do much with the recording stuff. A few things I want to do: record both guitar and voice with a reasonable high bitrate, no background noise and the music will be used as background music, so ... it should sound like that xD. I really hope you can help me. Thanks