Welcome to the forum. You will probably want to post in the Table Top section a bit further down if you are looking for something involving Mutants and Masterminds. Now, there might be someone willing to teach you how to run or play the TTRPG but do note this forum is more of a forum writing RPG site and while there are plenty of Rps that are based of table top ones things are very different there than your usual game night at home with piles of pizza boxes, empty cans of mountain dew, and the sound of dice hitting the table as your DM sits behind their screen plotting your demise. (Okay, maybe not that different but it's all text based here.)
Anywho, once again, welcome. ^^