>Hi there, I am not a developer
In that case, please understand that responses here are focused on making apps, not solutions that depend on other schemes. In your case,
the burden is on you to find someone with experiences in soliciting donations via the web
>not sure what you mean by being a reader?
A reader app is used to help a user view content they've already purchased from different sources. Don't let the suggestion to adopt that method confuse you...it doesn't seem to be a solution you can employ in your example where the goal is to ask for and collect donations.
Apple says this about that:
“Reader” Apps: Apps may allow a user to access previously purchased content or content subscriptions (specifically: magazines, newspapers, books, audio, music, video, access to professional databases, VoIP, cloud storage, and approved services such as classroom management apps), provided that you agree not to directly or indirectly target iOS users to use a purchasing method other than in-app purchase, and your general communications about other purchasing methods are not designed to discourage use of in-app purchase."
>...how to collect money outside the app.
devForums is for questions/discussion on Apple's tools, and how to make apps - you'll need to do your own research for other topics.
Good luck.