dont be put off if it breaks. there have been plenty of people like me on here. made their first board bow, turned out beautiful. then mess up or break their next few. i dont know how i made a good working and shooting bow with my first one, but it worked out ok. just go slow, when removing wood, dont try to hog off too much at a time. take it down to a little above your lines, then move to the other side and do the same.
most of us are still learning and asking questions. dont be afraid to ask whatevers in your head.