Pictures:
Take a picture with your phone.
Find out where it's saved on your phone.
On OTT, reply to a thread. Click the "Attach File" icon on the edge, top or bottom part on your screen. It may be a paperclip symbol or similar.
Depending on your phone, pics may be in media or files or other. Search and find the pic you want to post.. click on it. It will take a little time to download.
It will say 100 percent when it's uploaded to OTT. Then click Thumbnail or Full Image. It Doesn't matter at this point, we can see Full Image by clicking on your picture's Thumbnail.
Click on "preview", to make sure that your sending the correct picture! We don't need birthday party pictures. Lol
Submit the post.
Hardest part is finding the picture on your phone. On my Android, it's in "Files".
Good luck. Send it.