I don't think you have cause for worry, she sounds pretty lively from what you've written and the effects of MBD can be reversed through proper calcium supplementation when it hasn't gotten too severe. Do you know how old she is? Might be good to ask her previous owner just so you can get a good idea for feeding. Young frogs eat more than large frogs, there's a nice chart here which can be a great reference.

As for food, I would only recommend avoiding mealworms as they are very chitinous and can be a cause for impaction in younger frogs. I also know offhand that waxworms are pretty fattening (I've seen some people describe them as froggy donuts lol) so best limit those if you want to use them.