ExDancer there are many brands. If you get a genuine Roomba, all the controls are on it (at least they are on mine, which I have had for a few years) so you don't need to involve any Wifi, Alexa etc. There is a large button for Start and Stop, which as has been said can be pressed with a big toe, a button for Dock that sends it home to recharge, and another for Scheduling it. You don't have to schedule it if you just want to start it up while you are around, but it is very nice to lie in bed in the morning listening to it cleaning your carpets for you, and getting up to find them all done. The scheduling is not complicated - choose days and times for it to run, that is all.
A warning - don't leave any flimsy scarves on the floor, or dangling touching the floor. It gets very upset when it pulls them in.
And if it is running while you are not around, it needs internal doors completely open. I forgot to open one door wide once. When it came up against it, it opened it just far enough to get into the room, cleaned all around, and came up against the inside of the door, pushing it shut. Then it couldn't get out of the room to dock, and went round and round until it ran out of power. I found it later, huddled sadly in a corner.