Sounds like severaldifferent problems which can be mind boggling, so I suggest picking one specific item to work first and as you go along, some of the others may become clear to you.
I might go with getting one TV set to work as that is something many more of us have dealt with at home.
So you know about scanning for stations and changing the input on the menu on the TV?
You know about rotating the antenna to point toward the towers?
The manual will have the best info on how to set the amp best.
I would look at doing the more simple item of getting the over the air working first.
As a start on where and what you might find this is the link to how the many different layouts are laid in on building:
Notice the colors for the different coax on the drawing as those let you spot tape on the coax to ID where that one is expected to go!
If you assume that it is basicly the same as built ( not always true!) look to find which section matches the options on your specific RV and use that section as a guide to look at the coax from end antenna to the first TV.
One of the big hangups most have on OTA using the antenna is finding the switch to power the amp in the antenna. A check of your owners manual may help find it but it is often a tiny switch set into the faceplate of a coax connection.
This connection is often some place hidden like the compartment over the passengers seat. WARNING! This is a switch that is super easy to miss and find the plate but not see the switch as it is small and hides behind the coax!
Once you spot which setup you are likely to have, finding those parts may be the next big step and Winnebago does a pretty good job of helping as they have online interactive parts drawings here:
For the TV coax for your RV here:
It akes a bit to learn how to Drive this but clicking on a part in the list at right gives you that part in yellow on the drawing!
Or in reverse, if you spot a part and want to know what it is, click it on the drawing to highlight it on the list!
This will let you know where to find things like splitters where coax might be left loose??
See if that gets some help and shout back if not getting there!