so i have this funny little idea i'd like to try, for a long time i've wanted to produce my own hip hop beats by using maybe a drum emulator, and sampling little blues/jazz/funk riffs i've come up with.

i currently play in a melodic punk rock band, but i really appreciate some blues/**** etc as well as selective hip-hop.
i own a macbook at the moment which has garage band, that's about all - but i'd like to know what else i need to sample the guitar licks i write and use them as a loop, as well as a good way to make drum tracks.

any advice would be great, thanks guys
some guitars
some amps
some pedals
some crabs