There I can help, well kind of: not a medical advice though!

I highly appreciate the effort you’re putting in - and in addition to preparing for everything practice w few communication patterns on how to make them give you the info you need. You won’t be prepared enough for some of the shit people come up with, no chance.

S good example could be a set of guided questions or statements they should disagree or agree with.

I’m not medically educated at all so I can’t come up with food examples but what I’m trying to say is: prepare at least as well for crazy as you’re preparing for hard facts.

And for the drugs I can at least give s language perspective: slang has often very local derivates so while pages Likes these are w good stating point: https://www.addictioncenter.com/drugs/drug-alcohol-slang/ nothing beats a native speaker.

So you could either start a career as drug addict, or if you lack the funds and time, you could reach out to your local social workers and ask them to give a brief slang training wherever you work. From experience many are very happy to help others who get helping!

Just a few ideas, perhaps something resonates with you! Good luck ❤️