Struggling with form

I am eating right, sleeping enough, but I struggle with overthinking my form,

On leg days I train really hard on most of the exercises quads, hamstrings, abs,

but I struggle with calf raises because I shake a lot is that suppose to happen or no because I used to shake on leg extensions but not anymore

At least half of the exercises for upper day I struggle a lot like sometimes if I tuck in doing chest flat press I feel like im tucking in too much and I feel uncomfortable,

for shoulder press I can do heavy weight for 5 reps but I just feel like I need to lower weight

For tricep pushdowns I feel more of my core failing than than my triceps but extensions is a different story,

And lastly for seated rows I feel more of my arms giving up than my back I can not feel it in my back