I don't see the tank as a problem, at least for now. Too large of tank, too soon, and it's going to make feeding a nightmare. However, it will require a larger home faster then you think (then it will be a real tank, a 125 or 240, isn't going to be enough) and some of the current tankmates are going to make it just as hard. You really need to have the shark by itself to get feeding. Perhaps start preparing, find/start contacting people who might be able to house the shark. But you have a good 6 months, at least.
That said, the shark looks like it was born way too early, the yoke is still quite large. You said "I just hatched", did that mean you manually hatched the shark (ripped the egg open)?
Feeding tips, start small. Mysis, small pieces of squid, scallops. and silversides, all cut small, and some quality pellets. Try to interact as little as possible. Your hand in the tank will upset this guy.