just do it. It is not rocket science. you will need drywall compound, paint, paint brush, screw driver. You can install this thing with drywall screw and plug (I think they come with the light in most cases). Worst case,a piece of wood in case the location you selected has no way the put the lights on. So you have to put a piece of wood behind the drywall and fix it with wood screw. Cover the hole with a small piece of drywall and install the light. Then paint.
You will find it is very fun and easy once start, and very accomplishment once got it done.