Board Thread:Support Requests - Getting Technical/@comment-28529499-20160608224758/@comment-8-20160609161802

I think what you are looking for is Help:Preloaded_templates. You can create a template with the category you want in it, and then people can use an input box on the main page to go straight to a new article page with that template already in it.

Will that work for you?

(And thanks for Kirkburn for finding the thing I was vaguely remembering!)