Hey! Current TAMS student here. As long as you have good grades in your classes you should do ok. Your extra-curriculars do seem a little weak as you pointed out. If joining clubs at school is not possible for you, try and look for something outside of school to do. It is really important that you show admissions that you are a valuable community member. Even if your extracurriculars are weak, it is still possible to save your application through a high SAT score, and a high class rank. As of right now, it is difficult to tell your standing due to the lack of information of a formal SAT score and grades.