How to imitate a user on a website?

Question

Automation

Hello. There is a goal to automate your actions on the site, in particular on Instagram. For example, so that the program itself can add a picture to an account, or subscribe to someone.
Of course, hundreds of ready-made services have already been created specifically for such actions, but I don’t need a ready-made solution, I just want to learn how to do it myself.
In what language it is more correct to make it, what libraries? What is the algorithm of actions? In general, where to start?
I know PHP and JS, but it seems to me that this is not the best option for this purpose, but if I'm wrong, I will only be happy.

Answer 1

There was little experience in this.
It was necessary to log in to the site and put opr. page 5 points (there were ratings defined). In general, my very meager knowledge in c# was enough. Just authorization ala POST request, then another GET transition to the desired page and again POST (I put 5 points). In general, it was a rating cheat bot ... if necessary, I can look for the source code.

Answer 2

https://www.instagram.com/developer/libraries/
Immediately answer to 2 questions)
Or you can use js, but as a browser extension
PS Or write a call through the API yourself, but it will be more difficult

Answer 3

selenium