Yeah, the Internet is a godsend to people who repair their own appliances. For the most part you just have to figure out what's wrong (most appliances are pretty simple, so this isn't very hard), then look at the part for a model number and punch it into Google. Failing that you can enter the model number of the appliance and often get a parts list. The part you get usually won't be an exact match, but it should work, although you may have to fabricobble a bracket if the new part isn't the same size/shape or has mounting holes in a different location. This is pretty rare though, usually it's just bolting the part on.
This is also when you discover that even though Frigidare may sell dozens or hundreds of different fridge models at wildly different price points over the years, most of them use basically the same innards.
The key for someone like me is a site with videos for every little part for the exact model of appliance. And troubleshooting information, and possible causes of a symptom ranked by customer experience %.
There have always been DIYers, but I cannot do much of anything with just a service manual or parts list.
This is also when you discover that even though Frigidare may sell dozens or hundreds of different fridge models at wildly different price points over the years, most of them use basically the same innards.