After reading your question below, you are mainly practicing triceps brachii. If you want to improve chest stimulation, the width should be at least 1.5 times the shoulder width (wide push-ups).

The number of self-weight training groups depends on the limit number of times you do this action at a time. Usually, 60% of the limited quantity is selected as the quantity of each group.

How long is the rest now? Usually 1 min, the muscle will recover to 73% of the maximum strength, and fully recover in 3 minutes. If the goal is to gain muscle, do not exceed 1 min.

If you are currently at school, you can cooperate with the parallel bars to bend your arms and stretch your arms. This action is very effective for exercising the triceps brachii and the lower edge of the pectoral muscle.

You don't have to practice every day, just make sure you practice every other day.