patience, patience, patience, working slow is your best tool, next to the scraper.
Also, don't be afraid to ruin a bow, that is how you learn. i thought the same way you did when i started making bows, i worried so much about doing something the right way that nothing ever got done, at least if you are trying and ruining bows you are doing something.
the old saying says... If you ain't breakin' 'em you ain't makin' 'em.
just dive right in, besides, red oak boards are cheap.
good luck, Dan.
PS i didn't get a shootable bow until my 5th or 6th try... They all broke, and after several dozen bows now, i just had one break on me last week when i started to tiller it.