I‘m surprised they didn‘t go over the assessment sheet with you. basically they do a little arithmetic with your age weight, #of pushups, # situps, steptest and they somehow get a number and you either pass or fail. Its the standard assessment sheet you will see throughout your CF for fitness tests. When I first did my PT test the trainer went through everything, if you weren‘t so good on the step test they‘d tell you to run a little more, you can do many pushups then work on uper body. If you met the minimum requirements you should be ok. I was on platoon with a MARS officer who was in great shape, she could swim and run forever, but could only do 4 pushups, they weren‘t gonna kick her out of the forces for that. They will just condition you until you meet standards. If you do fail its no big deal, just know what you need to improve on and you‘ll be fine the next time.
Charles