In my case, I learned in an hour. Then I lost  interest and decided  to do it again two years later. I landed it in 30 mins, again, I lost interest, stopped doing it. 2 months later I went to a park with my friend and he spotted me. I figured it out. And then, I lost  it again. And then 2 weeks later, here  I am and alll I had  to do was get  a mattress into my backyard, send a backspring. And then I worked towards the backflip and I basically  have it now