Calisthenics Unity

I've been thinking about starting the workout program but I've already been working out for 4 months so should I start at the very start or should I find a level that I think I'll be able to start at?

Thanks

I started from lvl 1 when I was able to do just 3-4 pull ups, but a lot of push ups, I could have gone to lvl 3-4, but I just decided to start from 1. It doesn't matter, it's just how you feel about it, you're not going to miss a lot if you find a level that you can do and start from it, since you *think* you have strength for it, lower levels should be pretty easy (even though nothing is easy on this program trust me xD).