I would recommend that you bring the pinkies back to the store those are way too small and will likely not be recognized as a prey
Was this BP feeding on F/T? If not than you should offer live, for your first feeding it is very important to emulate what the breeder used to do whether it comes to feeding or husbandry.
As for when feeding F/T NEVER microwave a prey, simply let the prey thaw near the enclosure (this is called scenting) , once thawed warm the prey up with a hair dryer. Grab the prey behind the neck, and move it like a live rat would move. If not eaten off the tongs in a reasonable time frame leave the f/T in the enclosure overnight, some prefer to eat them this way.
Finally I would also recommend that you do some research on your new friend as well.
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