3500W generator I picked up

Don't plan on running a whole lot with a 3500 Generator. I have 18K standby Generac and it won't run everything in my house.
Didnt plan on it. I am well aware of its limitations, as such only the handful of circuits i mentioned will be used. My gas heater, some lights, a TV, and a microwave. I checked the wattage on each item. I'm looking at 2300W total plus some misc LED lights in 2 rooms. This thing runs 3500W. Plus the microwave wont be in continuous use anyways. So most of the time with it running I will be using 1000W plus small misc.