Congratulations, to get a bow shooting is no small accomplishment.  I credit my first "good" bows to finding a supply of hickory board with some fairly straight grain.  Doesn't have to be perfect but look for as few run offs on a board as possible.  If you can find 4/4 or thicker, you want have to build up a handle.  Also, heat treat the wood early on, just after ground tillering so the wood is "Nearly to a char but not burned" and you'll avoid taking on a lot of set.  It's a process and addictive for sure!  Just my 2 cents.  Enjoy the ride and welcome to the crew!
Parnell