Korean Practice, Perusing the "Key To Korean" Website

Just as I perused the "Tammy Korean" enterprise, I thought I would look through "Key To Korean" since they are the second source of Korean practice material that I found. Key To Korean is this website: https://keytokorean.com/ .

I prefer Tammy Korean due to wanting a structural school, online. However, this website seems to have a lot of resources and also tries to give additional grammar points in a different format that is immediately visible. However, my primary would probably be Tammy Korean since, as a German-American, I love structures like I love cathedrals.

A kind of yin and yang way that I could see myself using these resources to get better at the Korean language, from an English speaking point of view. Still, as I said, I view Tammy Korean as my primary resource if I go forward: I love having lectures available to me.