docs: quickstart update

[vinckr]

Related issue(s)

closes #2032

closes #1916

Checklist

• I have read the contributing guidelines.
• I have referenced an issue containing the design document if my change
  introduces a new feature.
• I am following the
  contributing code guidelines.
• I have read the security policy.
• I confirm that this pull request does not address a security
  vulnerability. If this pull request addresses a security. vulnerability, I
  confirm that I got green light (please contact
  security@ory.sh) from the maintainers to push
  the changes.
• I have added tests that prove my fix is effective or that my feature
  works.
• I have added or changed the documentation.

Further Comments

I added a note to make clear the youtube video is outdated, will update it soon as well.
Also since the route changed a bit, you dont get redirected to login a bit moved and changed that section a bit.