punching without wraps and gloves is just plain stupid. No offence!

your hands are bone, ligament and tendon. you can't really strengthen them the way you want to. It doesn't matter who you are...punching a guy in the face with bare hands could break your hand.

Also, you can hit the bag 10,000 times a day, but if you're not doing it properly then what's the point? Why not invest at least some of that time hitting the bag at a gym, with a trainer? I was like you... just loved to hit the bag. Then I thought, you know, I have ZERO left hook. I think I'll take some lessons. you'd be amazed at how little you know. Depite what I thought was me hitting my bag hard, I sucked large and was doing everything wrong.

join a gym, always wear wraps, always wear gloves. bare hands are ok on the speed bag and VERY LIGHT bag work that's more like shadow boxing.