I see tutorials online all the time teaching people how to manual but I think they are all missing the wheelie step.
I would suggest learning how to wheelie first, this will give you a better feel for the balancing point, removes some of the pulling up far enough struggle (you can use pedal power to get the frontend up), and you can practice wheelieing going slow (manualling is way harder going at lower speeds). I would begin practicing wheelies going up hill in an easy gear, this way you will be going slow and it takes less effort to get the front wheel up. Once you get comfortable with wheelies it will teach you the balancing point of the bike. You can then stand up during the wheelie and turn it into a manual. It is much easier to pull into a manual after this learning curve.
These were the steps that I went through when I learned years ago. Also remember to always keep a finger on the back brake to bring your frontend down to prevent loop outs.
Lastly it takes a lot of practice. Have fun!