I think this diet could be okay, but certainly not great. I would recommend talking to an exotic pet veternarian first, and consult with them about the diet. I would try to provide some sort of protein in the diet, like you said, mealworms can be great! I would also try crickets! However, it would be best to give it another source of protein like meat. If there is not an exotic pet in your area, I would try to talk to the breeder you did/about to get your hedgehog from, and ask them what they were previously feeding the hedgehog to ensure a smooth transition to its new home. I hope you found this helpful, and best of luck to you and your new hedgie!