What is the Correct Form for Bench Press?Like all of it how low should the bar be brought down? Inhale Exhale?

i am doing 95 on bench press and the problem is that i think i might have the wrong form and because of having the wrong form is preventing me to lift like freakin 150(i wish). But if it is that i have the wrong form then i guess i can do more and if i am using right form then i guess its just that i am weak. also wht muscle groups are suppose to be active in the bench press. oh and if i want to increase my bench should be doing more reps and low weight or low reps and high weights. Which one would be better?