To create a new article using this format:
quarto use template friosavila/simart
This will create a new directory with an example document that uses this format.
To add this format to an existing document:
quarto add friosavila/simart
Then, add the format to your document options:
format:
simart-pdf: default
See template for some options regarding fields for author's affilation.
Here is the source code for a minimal sample document: template.qmd.