2, anaerobic first and then aerobic, but aerobic time should not be too long, 15 minutes is appropriate.
It takes 30 minutes to take a bath after dinner. I don't quite understand the specific reasons, but it is unhealthy to take a bath directly after meals. Fruit can be eaten before practice or supplemented quickly after practice (bananas, milk). It is best to practice before eating, but be sure to control your mouth and control the intake of carbohydrates, protein and fat.
There are many kinds of stretching. I usually stretch my legs 10 minutes, 6 movements, 4 movements in my chest, 3 movements in my back, 4 minutes and 2 movements in my shoulders. There are tutorials on keep, so just follow them.
5, HIIT is aerobic, very good aerobic!