Let us hope it’s not knob and tube: that’s going to really limit your choices and you may have to just go with smart bulbs. But knob and tube (k&t) would be unusual in a house built after 1940.
(Oh, one of the first things you’re going to learn about home automation is that tiny details can matter a whole lot. 
You’re going to need to look things up and get exact model numbers and exact specifications and read manuals in order to make the right device choices. It’s fine if you don’t at first, just be prepared for people in the forum to ask for more details if you don’t have them right away.)
Both smart bulbs and smart switches can be controlled by voice, and both can dim depending on the exact model selected, and there are lots of ways to address the issue of not turning a smart bulb off at the switch. So that one is a solvable problem.