I agree with Hiram. If you can’t hold it comfortably for 5 -6 seconds you will have form problems resulting in erratic accuracy. I started with a 30# fiberglass bow years ago and after years of shooting I could shoot close to 70# accurately enough to hunt. But getting older and more sedentary in my work I have lost some ground as I discovered, and have gone back to 45# for now. 50# -60# has been my choice for many years but I have had success with 45# in the past. Start low and work up. If owning more than one bow is not practical you could get a take down and purchase different sets of limbs in various weights so you can taylor your bow to your needs whatever they may be.
Duncan