Welcome! I'll take the easy question... the cable TV
Look for an outlet on the outside of the camper - it's usually located close to the power and water connections. It will be a coaxial connector. We carry a 25' length of coax cable. Just connect the cable between the connector on the outside of the camper and the connector provided at the campground (usually located either just beside or in the same box as the power connection.)
There is often an 'output' coax connector on the OTHER side of the camper, under the awning, where you could setup a TV for viewing outside. Don't use that one..
Hot water heater... depends on the type you have. If you could uncover the hot water heater and take a pic that might help. Generally though, it will run on propane and/or electricty. Look for a switch inside the camper on your panel for turning it on. Before you turn it on, be sure the water is connected and you bleed air out of the tank by holding up the release valve. You want the tank full before you turn on the heater to avoid burnout.
Here's a couple of good videos about general RV water heater help. Check out other vid's by these guys for good basics on RV maintenance and operation. Enjoy the new RV!
How To maintain your RV Water Heater by RV Education 101® - YouTube
HOW TO: Flush a Suburban RV Water Heater - YouTube
(I like RVGeek's videos)
If you have dual electricity/propane heater, AND you have the switch on the outside turned on, it will automatically switch to electric when you are plugged in at the campground. This saves on propane, but water is slower to reheat.
2012 Flagstaff V-lite 30 WTBS
2011 Ford Expedition
4 kids and a hubby & never enough time to camp!
2011: 17 nights 2012: 26 nights 2013: 46 2014: 20 2015: 16