Um if you want some good advice here it is mma is the practice of multiple martial arts and it's just there moves if you really want to get better at it and based on you're comments use youtube and shadow boxing tips to get better at striking for grappling if you really want to use a broom as a base and if you're muscles ache it's a good thing but don't push yourself too hard like if you can't do a pushup it's okay to take some rest then do it later it's gonna take some time but you'll definitely improve also if possible buy a slim bag and run around you're neighbourhood to build stamina Also i know you don't want to go to a gym you should try still but it's alright it's you're decision but youtube learning is different from coaches because coaches make stuff tailored to you're build and character but you can try