You're Welcome, Anna!
As for the folder preview icons, I have also tried this but it is very time-consuming, and the preview is so tiny - it would be nice if it was enlarged in the Bridge preview. I use Bridge all the time, but no tags - if there is something specific I am looking for and I know the name, you can type in the search menu on top, and expand the folder selection to locate if you are having trouble finding it. Otherwise, I have things sorted by categories in different folders. With subcategories and sub-folders.
Like the kits - I have an Art Kits folder, and in the Art Kits folder is the separate Art Kits and their previews so I can quickly go to the correct folder.
You just have to find what works best for you for organizing.
If you have Lightroom - you can import the JPG previews and tag those, and then find them easily.