AFAIK, fall is the best time to seed a lawn in most of the northern US.
(Intense drying periods of summer are past.)
Shade-mix in one part, your choice in sunny part.
Very likely, you can get seed started before it's time to use
leaf-blower, as opposed to rake, to remove leaves from above. Small
amount of leaves remaining in place is no problem for grass; in fact,
they offer some protection. Worms _love_
maple, ash, most anything but
Depending, you might want to till in peat moss or manure or whatever
amendments will help grass, into top 6-8".
Grass will continue growing until hard frost.