OK,  here's how to use Pinterest to help with setting and characters!

1. Create boards for your characters. It's up to you whether it's a secret board or not. You have two options:

a) Create one board for each character and each sub-section is its own catagory. For example, a section for memes the character would relate to, quotes, aesthetics etc.

b) Create one board for each story you are planning, and each section is a character. The sections would have mixed memes and aesthetics.

2. Create a board for your setting. Again, this can be its own board or part of the whole story board. Save images that remind you of the place.

3. Don't get carried away! Pinterest is fun, but make sure to actually write the story instead of saving the 400th meme to a character board (guilty).

This concludes me trying to be helpful.