Does your screen look like this 🟣 when you click to create a new 📝? https://nostr.build/i/nostr.build_bbe19e7ed67640b3d4de7cdf23ec10abe686cf49edd6d9399fa52c64f6951287.jpeg

If so you’ll have options from there of where to get the photo from.

Another simple thing solution is upload it to: http://nostr.build/ And then you just paste the link it generates into your post 📝 that you’re creating. Let me know if you need more help! 🤙