You don't create an account. And do not save coookiies for it. Only use a web browser. This would severy limit your usage as Instagram would constantly nag you to login and deteriorate your experience. But worth it. This is how I use it.
You don't have to go to Instagram frequently but only when someone shares a link with you.
I only read the titre to ne honnest. But anyways to use it privately for real is to use it without account.