The age old advice that bad form will wreck your body is false. Now, yes, extremely bad form when lifting heavy weights may cause injury. But when starting out and learning the movements, the weight should be light. Usually it's not the technique that causes injury but other things like increasing volume too quickly from what you're used to, life stressors, lack of sleep etc.

It's very rare to start doing a set of squats for example and all of a sudden have a catastrophic back tweak because of your bad form. Lifting is safer than most sports!

Check out this article on barbell medicine about pain and their other stuff too:

https://www.barbellmedicine.com/blog/pain-in-training-what-d...