Hello everyone. I moved into my home last summer. We had 2 enormous trees in the yard which blocked any sun light from getting down to the yard. With this happening the yard was basically just moss and very little grass. Now this season i want to repair the yard i am already getting patches of grass but the yard is very uneven. It has many little "lumps" which are 1"-3" higher then some other parts. So my question is what would be the best way to take care of this? I want to level the yard and get some nice grass. I was thinking of renting a rototiller and tilling the entire yard. would this be a good idea? do i have to remove the patches of grass that are there first? I figured that i should start this process soon since the warm weather is coming