hey luis, stencilling is pretty easy and low budget. You cant go wrong if you have a nice sharp scalpel with a flexible blade, some card or acetate and a good idea. Start simple.

Spray adhesive is also a good asset and masking tape. Oh and rubber gloves if you dont want to get painty hands.

Spray paint. That's important too.

Go to stencilrevolution.com they have cool stencils and workshops that you can do.