It is better to practice chest push-ups 20-30 times in the morning, middle and evening.
If there is no time, then 2-3 hours after dinner or half an hour before dinner in the evening.
You should practice your abdominal muscles every day, because it is the most difficult to practice.
The most common is sit-ups, and the main time to practice the above four abdominal muscles is 35 in the same group.
Then lift your legs and mainly practice the following four abdominal muscles. The time is 35 in the same group.
It will be better to do 2-3 groups of abdominal muscles ~ ~
Dumbbells are generally more suitable for practicing arm muscles. Personally, I think triceps and biceps look good.