went to see if that website had any suggestion for Greek. Books: "not very much, unfortunately". Schools: "again, not very many places offer a course". The forums are simply not loading.
The new (as in literally users that migrated after the owner of the other website stopped doing anything other than keeping the server running) forum is: https://forum.language-learners.org/
Oh thanks, I didn’t realise things had migrated. It’s been years since I was on the forum but I remember it being very helpful and pretty active so I’m glad it’s still going in another form.
For most people, I now recommend the Pimsleur[0] method as it explicitly teaches the “call and response” model, which I find most effective for the reasons I mentioned in my comment.
Assimil are normally a good bet in my experience.