Yoga is a beautiful practice that, if taught properly, can be adaptable to anyone no matter what size and ability level. You may have to do some research into yoga studios that hold smaller classes and teachers who consistently provide modifications to poses.
Hatha yoga or Iyengar yoga tends to work well with people who are overweight since they are slower practices. You must, however, remember to be patient with yourself. Give yourself permission to opt out of poses if you feel you’re not ready. And if you experience health issues as a result of your weight, please consult your doctor before adopting a new physical fitness routine.