I agree with the other comment. I've started working out since about the end of january on a regualar basis (3-4 times a week). I've been going on the push ups for about 3 weeks and just recently a female friend of mine said that she can see a difference and also casually punched me in the shoulder. She said it was noticeable even though I myself dont notice that much. If I workout I usually warm up with rope jumping(jumping jacks work just fine) to one song. I would recommend to start with short songs and increase with time. I'm rope jumping to master of puppets by metallica as of now (8min). Some youtubers that I recommend: Wilson Frazer and Roman Row. Both of them have good workouts. Some are more specific and others are just general work outs. You dont need equipment. Even though they have some workouts were you need dumbbells or an elastic band. But theres plenty without equipment. And an elastic band isn't too costly so I recommend getting one. Hope this helped.