I'd like to know this as well. I think this is one of the biggest hurdles to a first time user: If you're anxious or depressed, you're by definition not in a good "set". And with psychedelic therapists being rare as unicorns where to find that trip-sitter who isn't just a "That's groovy, man" weirdo that will shape your trip (and your malleable brain) into the bog-standard one with everything experience.