Not a dumb question, don’t worry. Some confusion arises as “Pod” is a term that is used to refer to a Fediverse instance and the personal Solid data store as well. But these things are acually completely unconnected right now
Although there are people interested in bringing these two together. (I’m one of those)
Technical background: Solid provides the underpinning so that people can store their data in their own place and give access rights to it to other people and apps. Solid is not really a presentation layer - so you cannot browse things, and there is no timeline that shows you the content from all your friends and people you want to follow.
The Fediverse is a set of web servers that store your data and handle the timeline and all that.
It is entirely possible to create a Fediverse server that instead of handling the presentation and the data storage just does the presentation layer and then stores all the data on your Solid pod.