I did not start from the beginning at least on all of them I did not. Bridges and HSPUs I started from step one but like yourself I was already doing push ups so it made no sense to to start at step one. Hanging Leg Lifts I did a lot of work on the floor before getting on the bar and squats went fairly quickly. I have so far only mastered those two exercises. Pull ups I am so far kind of stalled on and have been going back and forth with full pull ups and assisted one arm pull ups. All in all I am extremely happy with the program and look forward to mastering a couple more moves before the summer is over. I think that one armed push ups and one armed HSPUs are going to take awhile for me to get to step 10.