Right now the bands must be customized by 30 days out and ship at 29 days out for those that have that amount of time (or more) remaining before their check in. For those who get the opportunity to customize Magic Bands less than 30 days out you will have 24 hours to customize and they will ship the next day. Definitely keep checking your reservation and these boards so you will see when the link goes live for you.
This program is still in its testing/roll out phase. Being disillusioned with it is, IMO, a bit premature. Nothing is set in stone right now and kinks are being worked out. I think your idea to give up worrying is a good one. Worrying is just wasted energy and, as you said, this is beyond your control. I understand that you want your trip to go well, but I find that relaxing a bit and going with the flow always makes my trip better.
I know you say you are losing interest, but I have no doubt that once that link goes live for you you will be right back in it.