FOLLOW THE STEPS THEYRE IN ORDER YA DOOFUSES
Select layer that you want to have the lighting on
New layer above
Airbrushessss
Select the color you want for your lighting
Select smol N
Select screen
Screen :3
Clipping mask is like alpha lock it's super helpful helps ya stay in the lines SELECT IT—
Turn down opacityyyyy
Then reselect that layer annnnnd draw :00
HOPE THAT HELPED HEHE