Conversion kit.
Pull panels and the tub, replace two fittings (comes with three fittings, LP is #55 stamped on side of fitting) and rebuild the machine. Kit comes with instruction booklet for several models (yes there are pictures and yes it’s pretty easy). I would say if you’er not good at home repair, gas / LP work is better done by a professional. Im a handyman and have worked on hundreds of appliances. A homeowner can do this in an hour with a couple of tools! Read the directions step by step and don’t rush it.