Considering your 14 (As am I, and lets be reasonable here, you arent going to open up a shop without a heck load of cash), why dont you get a job at a LFS and holpefully stay there for a few years. Usually 2-3 years in, you could be in charge of the shipping/products on floor/livestock list etc. All this will be much more fun then going through the potential stresses of opening one up yourself.