I know Mineola and St James on Long Island - that leaves a lot of in-between for you. Look back on this page to Joshua's post that has suggestions for you. Read those. Get your equipment matched to the size batch you can make with it, look up some starter (simple, not high gravity) all grain recipes (see the all amarillo pale ale recipe on this forum). Then try out the BIABacus with your kettle dimensions and the recipe entered. Ask some questions about your recipe on this forum and FINALLY after all that, you can order either a kit that comes in the right size for your equipment, or you can order the ingredients from other non-kit sources. Whew, that's not going to have you brewing this weekend, is it?

You could check youtube for some examples of how people demonstrate BIAB. There is a pictorial on here somewhere by a Doc from New Jersey that is good - I'll try to find that for you. Home Brew Talk has BIAB videos, too. Bobbrews is fun to watch.
Assemble your stuff, think it through and ask questions so your brew day can have the best chance of success.