Hey bro, your heart is in the right place, but the above posters are right. If you don't know the game, you can't very well coach the game.
You're going about it the right way as far as your strength/conditioning training, and that can be your nitch, but you need to REALLY know MMA to coach a fighter during a fight. It takes an excellent working knowledge of the sport, as you need to be able to spot dangerous situations and opportunities for your fighter, and be able to talk them through it. Most MMA fans can name off techniques, but you need to know the mechanics of these techniques to talk your fighter through it if hes stuck in the ring, and that takes some serious time in.
You also need to be able to speak clearly, loudly and in a way that the fighter can understand your directions, and be able to pick up on detail at a distance, as you're not always in position to get a good read on whats going on with a fight.
As for fight experience = coaching ability, its a falsehood. Some of the best instructors and coaches out there (Tompkins, Greg Jackson, Erik Paulsson, etc) were anywhere from decent to terrible in the ring themselves. Its really a very unique skillset to be able to coach, and if its something you really want to do, nows the time to start learning the game and take some classes.
As for learning things like cage generalship and whatnot, its something you learn from training, and something you can learn from watching how other guys move and apply it to how you operate as well. Cage fighting is still a relatively new phenomenon, and is developing as a science, so if you're interested in things like fighters gameplans, watching fights is the best way to figure out what works and what doesn't.
Oddly enough, playing this game is also a very good way of picking up on what styles and gameplans beat what.