oh fuck you're in for a wild ride
If your school requires your kid to be lice free I'd recommend going the thermonuclear route and going to one of those pro places. They'll get the bulk of them, though I still manually combed through my daughter's hair daily and found a few here and there. Make sure you have them show you in person how to comb through the kids' hair properly -- that's the biggest thing you're gonna be getting out of this.
If your school requires your kid to be lice free I'd recommend going the thermonuclear route and going to one of those pro places. They'll get the bulk of them, though I still manually combed through my daughter's hair daily and found a few here and there. Make sure you have them show you in person how to comb through the kids' hair properly -- that's the biggest thing you're gonna be getting out of this.