Your questions are good, and it sounds like you are aware of the problem with stringing the bow, leaving it strung and trying to shoot it without knowing more.
You might check with Ted Fry at Raptor Archery, or Mike Yancy, Pine Hollow Longbow. The bow building forum might be a source. Look in the resource forum. Try the Sponsors directory on the homepage of TG. There are a number of very good books on building and care of self bows. Those still in print are available thru Kustom King, 3Rivers, and other sponsors. There are a number of bowyers, outside TG, building selfbows and they have ads online and in Trad. bowhunting magazines.
I would keep a notebook handy to write down info as you find sources.