There are a lot of sites to check out on the net about it. Do a search and you should come up with lots to read. A good place to start is
http://www.fibreglast.com/ which has a section for new people.
Supplies are as complicated or as simple as you want to go. You can get by with some carbon fiber fabric, some epoxy resin, or other resin depending on what you need, and some plastic squeegies.
the net is probably the best place to buy stuff(fibreglast.com and uscomposites.com are pretty good), otherwise you could check out boating places or hobby stores, they have some stuff, probably not fabric though.
you can find step by step articles at fibreglast I am pretty sure, you can try the library for a composites book, they will help alot.
the only safey precautions while making are, wear gloves, don't get resin on your skin, wear a respirator with an organic cartridge, keep good ventilation, especially if you use polyester resin, it stinks bad.
good luck, it's pretty fun stuff, i always feel rushed to get done before the epoxy kicks, but you have more time than you think
let me know if you have any other specific questions