Can you separate chicks from mom?
x's 2. The main thing is to spend that time. You could have flighty and unfriendly chicks even if you hand raise them if you don't teach them to want to be with you.
Become the treat feeder! LOL!! The bold ones will lead the way in hopping up on you if you sit with the treats and slowly bring the food closer to you with each visit.
If the Mum usually sees you as the bringer of tasty treats then leave them with her as she will teach them you mean good things. Our girls were a bit protective of their babies until the chicks were up and about (maybe 48 hours after they all hatched) then they chilled out and we could hold them anytime. It's gorgeous watching the interactions between Mum and babies as well. Having brooded chicks myself and letting my broodies do it I'd leave it to the mother hen any day. They teach them so much right from the start and you get all of the fun and none of the responsibility.