I’m very new to Obisidian but I can see it being useful even with a lot of images, you can reference the screenshots in a note that groups some photos together and start linking those notes. The power comes from linking the notes together, while you can’t link the photos themselves you can do it through notes.
A shortcut that will be great for you: CMD+E to toggle between edit and preview modes. In edit mode your screenshots will appear as:

When you press CMD+E they will show up inline.