How to make a communities app that can allow the user to upload their file

I want to make a community app that allows the user to upload their file.
I will make it for my learning database app in my computer project.
I’m still a rookie but I’ve tried every way I know

(My app name is Pincest)

You can use web viewer to do that. Make your own website with wix.com and go to editor-apps and search for community and then add to your site and copy the link of your site and view it in your app. Easy pissy