When I master ate it bruns my p***y
You don't give much information, but it may mean you are too rough, or needing more lubrication. Or it may mean that you have an infection, maybe an STI.
If you can give more information, including your age, location (country/state/county), whether sexually active, and your masturbation technique, more help might be able to be given.
I hope this helps as a start.
Yes, it takes some getting used to. Try doing it in the shower and spitting on your finger first.