On the first tree I would leave the buds on the scion, but remove growth below the graft.
On the tree that has blooms I would try to knock the blossoms off and hope that there a vegetative bud in reserve.
I’m not sure about collecting scions without spurs either, but if you can find a piece of last year’s growth that is several inches long you want to select the middle part of that for your scions. There usually won’t be spurs there, in my experience. Honestly, I haven’t paid much attention to it and I’ve only had it happen a couple or three times.
On the scion that does not appear to have taken I would cut a notch above it and leave it until it either fell out or took off.
Good luck and have fun!