I do not really see the benefit of doing finger exercises for two hours a day. At least if your goal is to make music. A lot less will give you enough general workout to be able to do music. 15-30 minutes would be more than enough IMO.
In the near future is will also ask questions about improvisation and theory. But right now i really need to gain some good technique. Because my right hand is injured now i have to get the best out of my left hand.Here you can read about whats wrong with my right hand, if you wish, of course(i believe oatin already read this )https://www.pianostreet.com/smf/index.php?topic=38906.0
Yes, I remembered you having some problems. And it worries me that you do such exercises in such a vast amount with an injury. Because IF the injury is related to the way you use your hands or there's something wrong with the position/alignment of your wrist, elbow or shoulder, doing hours of finger exercises fast is not the solution. Playing very slowly, or if fast with a very light touch, counciously trying to feel if there is tension, listening to the sound and trying to relax your upper body seems to be a better way to find a technique that is both fluent and effortless. And avoid any further injury and get rid of your problems. I have some experience with this myself...