I would just type “photo editor” into F-Droid and browse, nothing on F-Droid will have ads. If you don’t have F-Droid installed follow this.

https://f-droid.org/docs/Get_F-Droid/

I would just make a substack or a self hosted ghost website unless you’re really invested in the development process.

I would just look at sites like https://apnews.com/ or https://www.bbc.com/ and see what they do, but I don’t think you technically need anything, plenty of people have wordpress blogs and substacks without a legal section. What’s the difference between your website vs a twitter account vs a substack where you live, probably not very much.