upgradable skills/abilities

[msammy93]

Hi, I just wanted to know if I am doing this right.

 

So, to get up-gradable skills, that would be like "frostbolt level 1", "frostbolt level 2", etc.. where the higher levels have less cooldown and more damage, I need to make a skills named Frostbolt, then make multible abilities named frostbolt level 1, 2, 3, etc. Then I need to make individual effects for these abilities? Then when playing the game I can simply add skill points to the spell frostbolt to upgrade it?