I’d advise against starting with BT dose.
On the contrary, I always introduced people in steps. And it always worked good!
More advanced psychonauts - less steps.
First step taste and feel, give them 5-10mg.
They will feel maybe bodyload maybe slight ringing maybe heart racing. So they dont get scared when same happens on big dose.
Then increase dose by 5-10mg and use feedback as a guidance.
I think it is no bueno to subject people to BT doses on the first try. Its similar to pushing somebody hesitating the jump imo.
I know lots of people here think otherwise but w/e