In fact, Tae Kwon Do can provide many benefits to people with medical conditions. Please contact the instructor so that he understands your limitations and can help you continue to grow. You will learn how to overcome challenges and improve your life. You will also learn how to defend yourself. You will also learn not to ask this question.
Many people feel overwhelmed with the amount of material covered as a white belt.
Don't worry, this is common. Try your best. Perfection is never expected. Trying your best IS expected. If you need more instruction or time, simply speak to the instructor.