Welcome. Winnebago makes a lot of useful information such as wiring and plumbing diagrams available online for their motorhomes. The Service Tips make for good reading, especially for new owners. The one on Sealants is particularly relevant to a new owner since preventing leaks is paramount:
Winnebago Owner Resources| Legendary Customer Service
Another thing to research is the proper maintenance of the edges of the Winnebago fiberglass roof. There's a lot of information here on Winnieowners, but here's a good video on the topic:
Your's may be in good shape but, if not, it should be your number one priority.
Find yourself a good, local, RV repair shop, possibly with mobile service. Don't rely on a dealer which, even if good, won't be the best option for an older MH. In general, dealers and Camping World, have a lousy reputation for service on Winnieowners and other forums.
For "truck" related problems, an independent truck shop servicing your brand of chassis (Ford or Chevy) is your best bet. Call ahead to confirm but many oil change shops like Jiffy Lube may be able to handle your MH for routine service.
As an example of what to look for in terms of a good truck shop, here's who I use in Sacramento:
https://www.mikeandsonstruckrepair.com/
And, finally, you might want to go the User CP in the toolbar and set up a signature block similar to mine, detailing the specifics of your motorhome. That way we will always know what you have even if you forget to mention it in a post. Likewise, include at least a general location in your profile. It's often relevant to for us to know where you live in order to help troubleshoot a problem since things are often related to the climate where you live. For example, high humidity can cause problems I might never experience here in northern California.
