Hi welcome! My advice would be to not bring the baby home until it is absolutely fully weaned. I'm not sure how old Quakers are when they wean, but if they are anything like other parrots of that size, 9 weeks is not done yet.
Please leave any hand feeding to the person who is doing it now. Please don't let them pressure you into taking your baby early saying that it's only on one feeding per day and it's easy to do. It is best left up to people who are very experienced at it. Many people here will tell you the same and can elaborate on why. Basically too many things 'can' go wrong, as there's more to know than meets the eye. If something goes wrong, it can cost the bird it's life in the hands of an inexperienced hand feeder.
I know you're anxious to get your sweet baby, but it will be well worth the wait if he's completely weaned and ready for a new home.