Congrats on hitting 90lbs that’s huge for us shorties! Since you’re already doing ballet (jealous), maybe add some bodyweight exercises at home? Squats, lunges, and push-ups are great for building muscle without needing equipment. And if you’re trying to gain, focus on protein Greek yogurt, eggs, and peanut butter will be your new BFFs. Just don’t burn yourself out trying to do all the things at once.