To add a new post, find a subfolder in the post directory that corresponds to the year of the post.
If it does not exist, create a new subfolder with the current year.
Then, create a new folder in that subfolder with a short name for the post, such as my-new-post.
In that folder, create a new file named index.qmd and add the content of the post in Quarto format -- you can use the index.qmd file from one of the existing posts as a template.
If you want to add any images, you can add them directly in your post folder.