It will take alot of practice, so I will tell you what I was told (helped me alot). 
1. Cover your rear brake with one finger. 
 
2 Pull the bars towards your chest hard and bend your knees at the same time. 
 
3. Depending on how long your bike is will depend on your point of balance so once you have found that (I find the easiest way is to try and make yourself fall off the back of the bike then you will get used to how far you can go). 
 
4. Lean back point your toes and enjoy hope this is a clear explanation ive just come off a night shift   
 
and dont forget to wear a helmet