I am also on Instagram. I had started to publish part of my photos there.
I am however rather annoyed by the exclusive use of the imposed square format.
I think that taking a photo is also considering the space to present it. This is why most posts have a white border. This sometimes takes up more space than the photo itself. For me cropping to meet the conditions is not an option. However, I invite you to visit it and subscribe. (I often respond quickly to messages) .