After learning one language in school and a few others ad hoc on my own I gave this method a try.
I quickly gave up, though, once I discovered Dr Krashen's work on comprehensible input, and how boring and time consuming creating and studying Anki is.
Dr Krashen's work says that we learn language when we understand it. I.e. when we receive input at our level. There are quite a number of Youtube channels that claim to teach through this method, but many of them still resort to drills, themed vocabulary, grammar etc that are all pointless in the CI method.
The best one I've seen so far is Dreaming Spanish.
What's so cool about the CI method is that the spaced repetition is built in, implicit - if you're getting input at your level you will be getting repetition.
Children's shows are a great way to get input. Many countries have TV apps on iPad and can be viewed free with a VPN.
As an experiment I had my daughter only consume German media (living in Sweden) för a few years and she can now speak better German than I can, and I have never corrected her. She has broader and more modern vocabulary, naturally.