I want to do martial arts but I'm very physically weak, I struggle to do 15 push ups in one go. I've got a very slim build and a bony body (this helps in fights because I have a harder than normal skeleton). My waist size is roughly 28-30 inches in circumference. Weight is 50kg. I don't know other info you may need but ask if you do.
I'm currently starting with a small warm up, jogging for about 1 minute around the garden, stretching for another and then I start working my muscles. I do 10 push ups and then 20 squats and repeat that 5 times, take a 2-3 minute break and then do it again. after that I throw punches with my weight and muscle behind each one 150 times and go straight to... I have no idea what there called, I think crunches? hands behind my head lying down and lift myself with my stomach until elbows touch my knees, I do this thirty times, 1 minute break and then another 30. I know what to eat but I want confirmation if this is good or not, self made workout and I have no weights so I'm doing what I can.
I also want to improve my reaction time, mine can take nearly half a second at its worst and 250ms at its best and I heard there are exercises that can improve that, I play games a lot of my day because I have nothing else to do. Anything else I should do?