The first year is a lot of fun, so good luck, trevorc13! I think you'll find that some people will tell you to snip all but two or three main shoots and other people will tell you to let them go. Here's a photo documentary of my first year
. And to be clear, I'm still a noob, so take this with a grain of salt.
I started to trim all but the first few shoots and about a month into the growing season I just let the plant do what it wanted to do. I think that it's best to prune in later years but for the first one or two, I think it's best if the plant establishes itself and you let it go. I was really lucky to get such a good harvest in my first year.
As far is fertilizer goes, I just added manure three times (beginning, middle and end) last year and a natural fertilizer called BioBloom between fertilizer applications. The soil that I used was just purchased last year, however, so that may have helped. These plants are insane resilient, so I don't think that a fertilizer will necessarily make or break the deal.
Also, I would strongly recommend being prepared for pests/bugs/insects. Maybe get in touch with some other local growers or people at your LHBS and see what pests are likely in your area.