For anyone who are still confused.
After clicking on the Save button in Step 5 of the previous post, you must navigate to the Black Administrator Bar. When there, go to POSTS/ALL Posts, which opens this white page:
Click on the ADD NEW Drop Down Menu, and you get this menu, where you can click on either Block Editor (bad idea) or Classic Editor (Yes!)
Hope this helps some, but if not, let me know and I’ll see what other way I can help make it easier. No one should have to go through what I did yesterday!