@Anita I created 4 specific clients using #Shakespeare where you can post and upload without logging in. The trick at this is that random keys are generated for each post.
The average classic notes client:
An image client: https://nostr-image-board.shakespeare.wtf
A video client: https://vidstr.shakespeare.wtf
A music client: https://nostr-music.shakespeare.wtf
Maybe they can help you in your work in Africa as well and recommend them to other people there.
NIP-10 Client - Nostr Social
A comprehensive Nostr client for text notes, threads, reactions, and collaborative editing
