Your boys are SO gorgeous.
We are also relatively new owners and we also had this fear but we precevered and found that they LOVE dill, parsley and coriander for hand feeding, it also allows you to hold on to some so they have to stick around to nibble some off so i guess its bonding + getting used to your scent and building trust that way.
my partner managed to crack them by just staying still with a piece of coriander for about 10-15 mins and eventually our brave boy fred came out and had a nibble, from then on fred normally comes out quite quickly, gino our more cautious boy took about 3 days more to start being more brave but i think that is just fred rubbing off on him