To deal with your overweight or obesity problem, do the warm up exercises for the first week for 20-30 minutes and then in the next week, add surya namaskar to 5 rounds followed by kapalbhati (3 times) and naadhi shuddi pranayama (15 rounds) and progressive relaxation or deep relaxation technique.
You need to take the help of qualified yoga professional to learn these techniques/ exercises to manage your overweight or obesity problem.