I keep trying to focus on my mannerisms and posture (mtf)

It’s been so stressful. Anytime I try to put in the effort and energy to work on those things I try to do it perfect and I just feel so stressed afterwards and it makes me not want to try at all. Same with voice stuff too like fuck I want to be able to do those things right and I’m so tired in my everyday life I couldn’t dream of actually setting time aside to do them