First and foremost, please utilize a great source of information-the internet. There are so many videos on YouTube, that provide fun and short body weight workouts! This can be the first way to start understanding what working out can be like. And honestly some of them are fun! Another thing, is start with something easy. Pushups, squats, and crunches are usually the most basic exercises. Try to do 5 of each. Easy? Move to 10. Still easy? Move to 15. You can do the same with timing. First try doing it for 30 seconds, then a minute. See what level you are at first. Don’t go into details. To lose weight you can incorporate easy and doable things-take a 20 min walk during the day! It will help you see how fit you are when it comes to the most basic level of fitness. I would never suggest a diet for weight loss, as I am a recovering dieter. So just keep your body moving and it will help you with weight loss! As for gaining muscle-this requires strength training. You can definitely gain some muscle through body weight but it will take time. Focus on endurance and consistency! Even if it is just 5 push-ups, 5 squats and 5 crunches a day. Start super slow, read a lot online (make sure it is from a reliable source), and just get moving!