One thing that was super common on Mastodon / Fediverse prior to this mass migration was adding image descriptions to help be accessible to our many blind and partially sighted users here. Many people won't boost posts without them.
Please consider adding alt text to your images when you can. 
@BlurTheFur so how does one add alt text to a post on Mastodon
@Rainwolf When you upload an image, click Edit on the top right corner of the upload. There, it'll give you the option to add a description and also the focal point of the thumbnail
@BlurTheFur thanks for the tip ended up finding that button playing around with the uploading tools