I'm wondering what I can do to make it so after a certain
number of steps you get some SP restored I saw something
about steps as one of the options for variables but I don't know
how to use it

It didn't work

I never knew that common events self-switches don't work!

Sorry, you might have to use a switch instead of a self-switch....

It worked! Thank you

No worries, just as a fun fact, in Game_CommonEvent, line 64 has @interpreter.setup(self.list, 0). If you change that 0 to a positive number (higher than any event id number could be, say, 999999999999999 + @common_event_id), then common events can have self-switches
And if you don't include @common_event_id, then every common event will use the 1 set of self-switches