You can always ride a bicycle or run/walk outside but it got some risk of infection (low but exists).
Personally, I don't go out unless strictly necessary and exercise indoors. Most of time I do indoor cycling, my trainer was collecting dust at least for one year... I also have a PS3 eye and the move remotes for ages and only now I really started to use then with PS3 Move fitness to do gymnastics and wife also start to use it after see me exercise.
Even without any accessories you can easily find videos of personal trainers in youtube with exercises you can do at home with household items.
Other word of advise, try to reduce what you eat, if you always on the sofa you don't need to eat the same (and I love to eat and I'm trying a lot to do it).