Devoloping Skills with Event

Hello,

I'd like to have a system where my player can develop their skills if they use them during the fight. For that I would prefer to use the common events and overall i have an idea how to do it:
Set a variable for every charakter and his skills, have it add 1, when that charakter uses the skill (or add a number if there are choices in the game, like training the whole day) and when that variable reaches a certain amount trigger a event that removes the old skill and adds a new one (for example if A's skill scratch reaches 100 it es removes and replaced with cut and when cut reaches 100 it is replaced with slash). I think that with switch i could keep it all quit controlled, but my main problem is: I habe no idea how I can make the system count the use of used abilities.
All i can find is having a abilites or hitting a button... I would prefer to not use plugins, since i have prettymuch no expirience with that am a easily confused :rswt

Maybe you could help me with this?

Thank you in advance

I'm not sure I fully understand. Didn't you already answer your own question by mentioning common events? Far as I can tell your idea should work just fine.

How can i make the common event count the use of abilities?

a common event linked to a skill is executed whenever that skill is used. you just use a control variable command to count up how often it has been called.

Building on what Andar said, you could also call the variable in the damage formula for the specified skill. As the variable increases, you can also increase the damage that the skill does. This way, you can have the skills get stronger over time naturally.

Ok, thank you all for your quick help ^^

Use the same common event that adds to the variable. Add one, then run the conditional branches you want.