I hacked the source slightly so I don't take any damage in combat. Is a simple one line change so it's a cheat but a tiny cheat. I still cannot get past level 1

I hacked the source slightly so I don't take any damage in combat. Is a simple one line change so it's a cheat but a tiny cheat. I still cannot get past level 10-12 or so. (Wow, I suck.)