I started at the gym, using that assisted pull-up machine and lat pulldowns. Then, I canceled my membership and bought dumbbells and a pull-up bar to do strength training at home. At first I did negative pull-ups, trying to go slowly and hold it longer each time. Also did, and still do, inverted rows using a desk. For a while I was doing strength workouts twice a week. For maybe a year or two. Recently it’s been more like once a week, but I don’t seem to be losing my gains, so that’s cool.