Creating content via PHPMYADMIN
Don't even bother. This level of effort is not even necessary.

If you are just moving content from Drupal 6 to Drupal 8, use the built in Migration modules that come with core. It is designed to do this. I can't even quantify how long this would take to do in PHPMYADMIN of all things. You'd likely wind up corrupting the database itself. The schema is nowhere near as simple as it once was.

Please try using the tools and check the docs for more: https://www.drupal.org/node/2257723

All you have to do is point it at your Drupal 6 database and let it work. If you have basic content (sounds like Articles and blog posts) it should work very well. It will even build out the content type and taxonomy for you.

Even if the automatic route doesn't totally work, still attempt to use the Migration tools available to you. You will save a ton of hours (probably hundreds) vs editing a database manually.