curtis,
theres a few guys on here that have their own sites too. poorfolkbows, was my first build a long, before i found tradgang. Sam has a great site, but so does Jawge, and if you just look for builds on here 4est's build had several hundred followers too. there are others, but the point is just try one, enjoy yourself, and take your time. not that its not fun, even if you blow one up, but its a lot more fun to have a shooter within your first couple bows. as far as the string, theres nothing wrong with b-50, i still use it, despite all the other choices. and you don't need a jig, just give yourself a few inches past each end for length, twist a loop, twist the length of the bow till you are almost to the other nocks, twist another loop or tie a bowyers knot about a hands width from the other nocks, and check your brace height. b-50 will stretch when you first shoot it anyways (i still don't buy pre-stessed either) so you will have to shorten it anyways.
you said, maple and red oak. are you backing with maple? it will work, but i would highly suggest hickory for your first attempt, due to its almost indestructibility. also for expense, i would recommend brown paper and TB3, it is tough and super cheap. use the maple to have a nice contrasting riser. just my opinion