Thanks everybody for the considerate answers!
Yes, I'm a biological male. What made me so jumpy are topics like these:
https://www.breastnexum.com/showthread.php?tid=28627 (results in 4 weeks, 1000mg)
https://www.breastnexum.com/showthread.php?tid=21922 (significant results in 3 weeks - PM cream, though)
https://www.breastnexum.com/showthread.php?tid=27109 (buds in 4 days?!, 1000mg in that period)
I imagine something like this is massively susceptible to placebo, but against the second topic I posted there is no arguing, for example. I'm thin but also have man boobs, although they're an A cup at most.
My ideal scenario would be what Shirazmn described: taking a long time, perhaps years, for a B cup, so I can adjust properly.
I'm really scratching my head if I should go for 1000mg or some unorthodox regimen like the 750mg I described in the last post, since apparently 500mg is useless. Perhaps experimentation would be the key, as Russell said. Hmm...