I think the best way to keep fit at home is aerobics. There are actually many kinds of aerobics. You can choose a fitness dance course that suits you online, and then dance with the accompaniment of fitness dance. The effect of jumping will be good, and it is easy to sweat. Moreover, aerobic exercise can be easily done at home without other fitness equipment. And at home, aerobics can be done in the living room or even in your own room, and there are not so many requirements.
In addition to aerobics, I think the fitness methods that are very suitable for home are some simple fitness movements, such as slow rowing, squats, sit-ups, and flat support. These can be done at home and they still have a great influence on the body. These movements are relatively simple, and you don't need to use fitness equipment, as long as you are free to move at home.
If you are worried that your exercise at home is not standardized, you can also buy a treadmill and put it at home. So you can run at home anytime, anywhere. Moreover, running is also a way to keep fit. Running at night and then taking a shower and sleeping will have more effective sleep. In fact, there are many ways to exercise at home in summer, and yoga is actually a kind of exercise, so as long as you want to exercise, the problem is actually not a problem.