I tried using IFTTT and many other services but all were doing things or post from Instagram to another platform not to Instagram. I read more to found Instagram does not provide any such API as of now.
Using blue stack is again involving heavy installation and doing things manually only.
However, you can use your Google Chrome on the desktop version to make a post on Instagram. It needs a bit tweak.
You will notice a change in UI and the option to make a post on Instagram. Your life is now easy. Let me know an easier way if you can find any.
I wrote on https://www.inteligentcomp.com/2018/11/how-to-upload-to-instagram-from-pc-mac.html about it.
Working Screenshot