Alex is correct about the strength needed to shoot a bow. It's not so muc about brute strength as it is about the groups of muscles involved and the direction they are now pulling vs what they are used to. Take your time and avoid any injuries.
As for the noise, you should know that most bows are somehat noisier with the weight backed off due to the rigging (cables/string) not being as taut. This is just for information. Again, don't go getting muscle strains trying to prove anything. Learning good shooting form and practicing such will help develop the necessary muscles. As the old saying goes, Rome wasn't built in a day.
If You're Not Living on the Edge You're Taking Up Too Much Space
Martin/Rytera Staff Shooter
PSAA Life member, UBP Life member
PADI AOW Diver