It is expensive. Usually 45-60 dollars for a months supply.
I’ve used the American Shaman water soluble full-spectrum and Medterra isolate CBD oil. Both were effective for me with a slight preference towards the Medterra isolate.
It’s about the most “normal” feeling I’ve ever had. Definitely by far the most effective treatment I’ve had for anxiety, and that’s including the SSRI’s. Probably beats Lexapro because of the near non-existent side effects for me. But again, sample size 1.
The /r/cbd group is a good starting place.