What should be done for a chest workout?

I want to do workouts that will build my chest/pectoral muscles. If i only want to workout my chest, do i workout for a long time like for 30 minuites or do i do a specific amount of it? I do about 20 push ups every night (just to get used to it) what else should i do and how much of it? thanks

i would suggest doing

bench press 3 sets of 8-10
chest flys 3 sets of 8-10
incline bench press with dumbells 3 sets of 8-10
decline bench press 3 sets of 8-10

But if you can’t get to a gym, and still wanna workout your chest.
Do pushups until you literally fail. Then stop for about 1 minute then do it again until failure. Do this 3 times.

goodluck

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