Rasa 2.0 + version tutorial / master class videos

I am very new to RASA and I saw there are master class videos on you-tube teaching how to use RASA, but they are of version 1.8.0 but my version is 2.0. What should I do? Change my version to 1.8.0? Are there any updated tutorial videos?

This udemy course is on 2.0. I would not recommend going to a lower version, as everything is moving towards 2.x.