I just bought a travel trailer today. I have never camped a day in my life.
Since your are new I would look for CG's with 'full hookups'. I.E. water, sewer and electric.
That way you can get to know your trailer and how everything works while parked with full hookups, instead of worrying about where you are going to find a dump station.
Most let the black tank get almost full and the gray tank almost full when parked. That way when you dump it rushes out cleaning out everything in the black tank close that one and then pull the gray tank valve and that cleans out the sewer hose.
One thing I think ALL OF US agree on is when you are parked at a CG with full hookups, DO NOT put your sewer hose in the sewage hole and LEAVE YOUR VALVES OPEN. Keep the valves CLOSED and dump when almost full.
Otherwise you will end up with one big mess in your black tank commonly referred to as a mountain of poop on the bottom of your tank. Because sewage NEEDS water to run out.
Welcome to the forum.:C