No alignment awareness

I desperately need help with alignment. it’s ruining my golf game. I’m great at the range because everything is pretty straight, but as soon as I get on the course and there are angles involved my body and mind can’t process what it’s like to be square to the target. My shoulders are either square and my feet are angled right, or my feet are angled left and my shoulders are turned right. It’s affecting my ball flight and consistency. Help me master Saguto!