Hickory loses draw weight in humidity. So, for Pennsylvania, think about osage, ultimately. In Arizona, I can see very arid conditions, but when our monsoon rainy summer season arrives, the hickory bow's weight drops.
Osage would be a great investment. However, consider first making a board bow, to get your feet wet. A nice long, 45# board would teach you a lot. Or simply cut those osage and get started. Accept that you will eventually make many bows.
I agree with studying the photos of all the bows on this site. As an example, I never really saw how a bow can bend at the fades until bowyers gave feedback on others' photos of their bows. Good advice.
Set up a comfortable workshop or area. I use a rasp, two grip clamps, sand paper, a knife and to cut to initial size, a hand saw or with boards a wormdrive circular saw. Have two saw horses and a table on top. That is it, plus a luggage scale and a stick marked with inch increments. Simple.
If it is a comfortable, relaxing place, you will take your time.