I'm developing a 2D RPG game, like Zelda. I've developed a first version, for studies.
Now, I'd like rewrite it in better way

The character has strength, agility, willpower, constitution, dexterity and concentration and has to fight monsters. Typical.

But I'm a noob, and I would like advice for creating the game system that the characteristics for damages, level-up, resistance, and so on. The one I used in the first version was not balanced.

So, ***what kind of system can I use ?***