If you're thinking, "But I live near a big city, I won't be able to see anything due to light pollution", you can still see quite a bit, even with the naked eye. Go outside after sunset, and just sit or lay down, and stare straight up - you're very, very likely to see satellites going overhead.

They look like small moving stars, and can be easily distinguished form airplanes by the lack of any blinking lights, and their speed (and surprisingly brightness in some cases) in the night sky.

I live in the NYC area, next to a large airport and several big cities, and a big school stadium that'll light up the sky when the lights are on, and can still see them zooming by overhead.

(And you can install the ISS Detector app to get notified when the ISS and the Tiangong are going to be visible overhead in your area.)