Hiii I'm going during April and May for two months
I wanna see NY etc too, all the obvious stuff, bgi cities and US culture, but then like Grand Canyon Nation Park, the Rocky Mountains, New Mexico, Colarado, California, Yosemite National Park, Oregon for the scenery
Depends what kind of scenery you prefer?
They have amazing desert landscapes, mountain landscapes, wooded landscapes, valleys, beachy coasts, rocky coasts...pretty much everything! You could probably do it all in four months
Also, Alaska would be amazing too, but it's pretty far away really, so it's up to you.