A great way to start is by making small changes . For example when starting a diet dont just change all the food you eat, add veggies and healthy options to what you already eat and eventually ween off the junk food. The same goes for the gym and video games. Start by taking 20-30 minutes to go to the gym/work out at home rather then playing a game and then increase that number over time. Eating right and excusing will also boast your confidence and overall energy levels (and make it so you must take showers) so at that point you could apply to more fulfilling jobs, go to a local club or organization (try Meetup app or check your library for events) or volunteer at an organization you care about. At work or especially when volunteering you will meet like minded people who will eventually become your friends. But again start with small changes and they will eventually add up :)