Quite a challenge here, having level soil is worthwhile but the dry conditions make it hard to move soil at the moment. I would certainly mow and then see more clearly the lie of the land.
Beyond that, it depends on what resources you can muster, how strong you are feeling, whether it rains to soften the soil, how level the ground is apart from the mound you mention, what perennial weeds may be growing and how quickly you want to be cropping.