To expand on that, absolutely people need an initial opportunity to use the concepts and understand them. Then I would recommend actual video-recorded practice sessions so that people have an opportunity to observe themselves working and get immediate feedback on how they're asking questions or conducting an analysis. These are methods regularly used in counselling and clinical psychology training, and I think in judicial training as well. People need in vivo feedback based on their actual performance, not just didactic exposure to concepts.
I would also agree with involving people who are directly impacted in the early sensitivity training.