It's always nice to welcome a new DIYer. Here are a few hints:
1. The Google search box near the top of the page is more productive than the "Search This Forum tab.
2. For things that aren't unique to Winnebago, you should also join it's sister site IRV2.com and search both using the Google box. Examples are replacing flooring, refrigerator issues, etc.
3. Edit your "signature" to include the year and model, floor plan and chassis of your Winnebago. T hat way we won't have to ask and you won't have to enter it every time you post. You can see this in mine, below.
4. Find a good truck repair shop that services your make and model chassis. You'll get quicker and better service there than at an RV dealer.
5. Your first DIY task should be your roof. There are a ton of postings about roof maintenance, but my advice is to use the sealants specified by Winnebago:
Despite what you'll read, don't use Dicor, it's formulated for rubber, not fiberglass roofs. It probably won't damage anything but won't be as effective as Winnebago's recommended sealant. The most common Winnebago recommended sealant is (also available on Amazon and from other sources):
5. Before you go too far, weigh your MH (front and rear axles separately), loaded for travel (full fresh water and fuel, empty waste tanks + all your stuff and passengers) and fine tune your tire inflation. This will improve your ride and handling. You can do this at a truck stop and can ask the attendant for details. Here's a helpful link:
(You can find inflation tables specific to your tires online. There are links to more informative articles on the left side of the linked page)
Have fun, and remember, when you're hot, tired and dirty, remind yourself of all the money you're saving.