burner on to medium-high. once the 3 kernels pop, put in the rest of the popcorn. a rule of thumb here is to almost cover the bottom of the pot with kernels. putting in too many will lead to kernels not fully popping. not putting enough in is robbing you of potential popcorn for your treat.
put on the lid and stay close while you wait for the popping to start. it’s a good idea especially if your pot does not have a heavy bottom to shake the pot back and forth a bit.
soon the kernels will all start to pop. it’s a good idea to let some of the steam 