how do I accumlate it?
I am an executive chef.
Do the waiter thing.
Do the cooking classes.
As you accumulate classes (cooking skills) the type of jobs you can get opens up.
Doing the work as a cook, chef etc will increase cooking experience.
or watch the cookery TV show 
or buy the cookery book
Watching the cooking show does not work i literall just tried i have it 80% but i can’t seem to get it even higher yes i even got a different job wat do i do. I have completed all the courses including 100% expert cooking buti just can’t get it over 80%.