I think you just made the right first step, coming to Stovebolt.
Browse this site, paying attention to the Tech Tips section and the Links section. At Tech Tips, it will show you how to do some typical maintenance/repair jobs. At the Links section, you'll learn where you can go to get replacement parts.
Go to the Gallery and look at trucks of your year. It is amazing what you can learn from looking at a similar truck. Learn how to use the Search feature, because odds are that you're not the first person to ask the question. To get an answer FAST, get one that's already been answered.
Finally, consider buying a shop manual. It is specific to your year and tells how to do most everything (except the thing that you happen to be working on.)

Welcome to Stovebolt, from one Texan to another.
Bill