"Try not to get yourself hurt too much. I don't think my healing is that strong yet." He needs to figure out how to use it to it's full potential. That said, he gets himself into position and readies himself. He doesn't know who he is as a hero without his quirk.

But... he can do it. He can fight with or without it. So that's what he does. Sticking close to Luz so they can work together to fight their way through the enemies that come their way.