Hi Jim,
I’ve been enjoying Duke’s life by proxy on instagram. It is the sort of thing that keeps me there despite the algorithmic post order, many adverts and lack of friendly API. (The best thing about flickr imo is that it has an API that can be used by mortals).
Have you seen:
https://ownyourgram.com
Which pulls your instagram into your own blog, indieweb PESOS style.
Personally I just post photos to my blog first, often via micro.blog, and then manually post them to instagram. I use the tag #manualposse if I remember.