Remember folks, adding alt text to an image is a good and helpful thing to do, but nobody wants it to make you anxious about sharing things when you don't have the energy.
Also, you can edit your posts, including the alt text, whenever you want, so you can do it later too.
There's also tags like #ALT4me where you can signal that you'd like a little help - people can add descriptive text in a reply.
Perfect is the enemy of good.
Actually added text to one of my own after writing this. 🙈