Welcome! But man oh man have you got a long way to go I never maxed pushups until my XO had us do a set of 50, ten seconds, 45, ten seconds, down to 10. Increase by five every week. With body armor.
Thats not my regimine
Thats what i started with though. I do straight up 5 sets of 45 with about a 15 second rest in between now. In the mornings to get blood goin and work up a sweat. I weight lift in the afternoons to actually gain mass and more strength.