Welcome, you're not alone. We were sailors for 20+ years in the California Delta area before buying a travel trailer in 2005. We did both for several years until RVing took over and we sold our Catalina 30. Several of our sailing friends are now RVers. You may have heard the old adage that Catalinas are the Winnebagos of the sailing world and it's an apt description.
Your sailing background puts you in good stead for RVing. Your best bet to find yourself a good commercial truck shop that also repairs RVs along with a good, independent RV repair shop for slides, etc. For the most part, RV dealers and large shops like Camping World should be last on your list for service.
Your 33V will have either a Ford or Workhorse chassis. Winnieowners' sister site, IRV2.com has "Chassis Club" forums for different chassis types:
As with boats, leaks are the first things to be taken care of. You should learn all you can about Winnebago's roof construction and windshield leaks. The best way to find things on Winnieowners is via the Google search block at the top of the page. It works better than the Forum Search tab.
Lichtsinn RV has good info on Winnebago roofs:
Also, AZ Expert's Youtube channel has some informative videos on Winnebago roofs and other topics: https://www.youtube.com/channel/UCs6...apU4bUNbLfTEDA
If you want to learn about slideouts, check out some of azpete's posts here on Winnieowners. Azpete is a Winnieowner who is also an HWH employee. HWH is the manufacturer of your hydraulic slides and jacks:
Here's a link to a Winnieowner's website that has a lot of good information:
Also, boats don't have tires. Here's a great resource from Roger Marble, a retired tire engineer and also a Winnieowner (Tireman9):
Winnebago makes a wealth of information available here:
And there are more helpful links here under "Stickies":
If you let us know where you live, some of us might be able to point you towards some good service locations. You can include this information in your profile so it's always visible. You can be as general or specific as you like.
You might also want to set up a signature block similar to mine and macnut's via the User CP in the tool bar that gives the basic info on your MH so it's there every time you post.