The quarantine time period is to make sure that the new bird doesn't have any illness/disease that could possibly be contagious so your present bird will not catch it. If new bird DOES have something, you can take it to the avian vet to take care of the problem BEFORE you put them together. Normally, this period of time should last for 30 days.
There will be plenty of time for them to get to know each other after that.
RIP precious Merlin 7/11/1990-11/17/2009 RIP Tweetylove 5/13/2010 Rest with Merlin