Hi Sondra!
You'll get lots of support here! People are so nice, helpful, and encouraging. We even have a "300+ Club" Support Group here and I know they would be happy to have you join them!
http://www.3fatchicks.com/forum/300-club-124/. There is nothing to fear. We all know what it's like to struggle with weight and weight loss here. The good news about your situation is that you don't have to exercise to lose weight. Exercise is fantastic for fitness, but weight loss is controlled by what you eat and don't eat. You can do this! Just take it one step at a time. Set some mini-goals and start doing this for yourself! Good luck!