How do I use Pinterest? Simple. I have collected salad and slow cooker recipes that I really use. I have a collection of quilt patterns, and I have dozens of watercolor painting demos, that I also use.
In addition I have a folder for dream home floor plans and decorating ideas.
It depends on your interests.
But you can collect things anywhere, in various ways. People used to have recipe files for this.
Why use Pinterest to do this? Is there a reason to make it public?