That all sounds great! Debian has had documentation and translation interns before. I think not everyone who has signed up to be a mentor (or who has been one) is a DD or DM. This shouldn't be a problem, as long as you're ready to help someone go through the process of submitting their work upstream (if necessary).
There's a form / template on the projects page: https://wiki.debian.org/Outrea
Do you want to talk a bit about your project idea and what the application project should be? Do you want to have a co-mentor or co-mentors?
Thanks for reaching out. It's really cool when people who were mentored want to help others get involved. :)