Hello and welcome hoping.
This is probably not the place for this question, but the moderators can always move it if they feel it necessary, so i will answer you to the best of my ability.
The best way to learn your role is to experiment and see what works best for you. I have been both a sub and a Dom, and know that i am a Dom at heart. But, for me, part of being a dom is bring pleasure to my sub, which sometimes means letteng her tell me to shut up and eat. With some experience under your belt you will find out where you truly belond, and if it is as a Dom a little experience as a sub will not hurt.