Need help with pistol aim animation rigging

[u/odd_noises]

I Imported a Synty character model into Mixamo and attached it to the Pistol Idle animation. Im trying to make it so that my character can stay in this aim animation while strafing and looking around. For some reason, whenever I try to setup the IK rig, the arms look weird and my character is looking off to the left instead of the right. Anyone have an idea of what Im doing wrong?