Yeah, I tend to shoot a little right [lefty] when I have too much tension in my forearm. When I focus on back tension, locking my scapula and really feeling the entire pull with my back, I am more accurate.
Arne Moe on YouTube has a video where he is working with the DIY guy on this....it explains it better. Arne- RIP- recommends a rotational draw that can help you get into your back and feel back tension.
When I started, I didn't know what back tension even felt like It turns out, I had been drawing a compound with arm/shoulders. Tension in your arm/hand isn't as big a deal when shooting a release, its a big deal when shooting fingers. It probably took me a year to develop my back strength and feel the back tension.