fitness industry

hi am doing well with my weight loss recently and iv always been in to training just getting the cardio in you know and im thinking of starting up a fitness youtube channel and then getting my own gym sometime down the line, already have a fitness clothing like going and iv talked to a few places about a preworkout supplement but not had anything back yet just wondering whats peoples take on the idea of it all and if I should start a blog first then work my way to video or straight to video. :smile: