Unprogramming mainstream upbringing is slow and takes long - many years, even generations, since many outdated subprograms are transferred from one generation to another.
Emigrants from less to more developed countries are an example of people who go through learning higher level and unlearning lower level of conditioning (mind programming). So it is not unusual for people to become radically reprogrammed in their lifetime. Things change regularly within one country and immigration provides even greater transformation. For light workers, it is often a radical transformation from mainstream upbringing to the new age mindset which is radically different.
As you choose people for the colony, consider bringing in people who already have had emigration and transformation experience on Earth, they are used to transforming, and it will be easier for them to adapt to the colony's environment. I bet they will find surprisingly many familiar things in your world.