How do you post a picture? - Lemmy.world

Probably more stupid than most questions here, but Lemmy seems to have a learning curve. I’m using Connect to access the fediverse. I’ve tried using the upload icon (next to the URL field) to upload a photo from my phone, but it remains blank after I try to select a photo. Do I need to use an external hosting service like imgur? That method has always been clunky to the point that I just never used it in the earlier days of reddit.