You have the Quirk One for All, as Izuku Midoriya received it. You have an ocean of energy buzzing beneath your skin augmenting your physical attributes immensely along with any other Quirks you might have. However, if you don’t have the muscle to withstand the power you will receive massive backlash in the form of broken bones.
Like canon, as you further you master your abilities the 7 Quirks of the previously wielders will reveal themselves. The previous wielders living inside your head is optional. Unlike canon, having other abilities along with this won’t kill you.
The One for All stockpile grows as you use it, in turn strengthening itself over time. If you give away One for All, through consenting and letting someone consume your DNA, you will lose the ability to generate the stockpile and have a limited amount left which eventually turns to nothing.