Hey y'all

So my cousin came home with a few teeny tiny stowaways (very young garters), which she then gave to me as she has no experience with snakes. I have experience with colubrids, but none this young, and am new to garter. I would love to see if I can't convince these 3 to take to captivity (before anyone asks, it is legal where I live, I have checked with wildlife officers). I only just got them today, so I'm not even going to attempt feeding for a couple days still.. When I do, what do you guys recommend to start with? I've read that baby garters can be difficult to get eating, so any help is appreciated. These guys are so small that even most earthworms would be too big. I've got sliced tilapia and basa fillets here.. but would they eat them readily? Should I start with feeder fish? TIA

Not a great picture but this is a reference of how small the smallest one is.. the other two are about 1.5-2x as big

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