Yes, pinky mice are too small for even hatchlings, and wasted energy just to consume them.
But pinky rats on the other hand, expecially those about a week old are perfect.
Or even see if you can get hopper mice, rather than small adults (hopper mice are fully furred, eyes and ears just opened for a few days).
Congrats on your first feed!
Its just impossible to get rat pubs here .. Bought a pair of rats now to breed them but I have three snakes of which only one needs that size so its kinda pointless too (and pet shops don't sell them until they are 4-6 weeks old).