Thanks for your answers I am going to buy 3 male 3 feamale guppy

Because I asked a man who is a pet shop owner he said me that you can buy six guppy 3 male 3 female and he is my dads friend also I will do it
I don't want to contradict a family friend, but the advice I've received both on here and from my aquatic store is that if there is only a ratio of one male to one female guppy then the females will get too pestered and stressed, and the males may get stroppy. I was told it should be a minimum of 2 females to each male, or all males/all females. Of course if i'm wrong i'm sure someone will advise.
Good luck with whatever you choose, I have three guppies and I love them, they're great!