The step that has me most worried is setting the drain properly. Everything else seems more or else something I’ve done before (leveling the floor and securing the tub)
Depending on your situation, you may be able to use a quick connect kit which can be pretty easy. But yes, the drain assembly needs some care - especially if you need to cut finished pipe to length for, say, a cast iron standing tub. Its not too different from a sink drain assembly if you’ve done that before.