Hello- New to projects and am still getting to know the software.

I have searched everywhere to find a place to write simple notes within a project. I would assume this would be within the dashboard. Is there a way to add a simple not field or two? As a work around, I'm creating a document within the documents section and I'm placing notes in there, but this is a very awkward workflow and it ends up opening a new window.

Any advice? Thanks!