Make sure you're knowledgeable about the jobs you're interested in. Despite the stereotype that computer programmers are shy and don't like talking to people, they still have to converse regularly with clients and/or the business people they work with to complete a project. Anything in IT involves a lot of interaction with people.
It's quite difficult to get a job that doesn't involve that, but you're only young so you may find a strong interest in a career pathway when you're older. Sometimes interests help overcome the anxiety if you enjoy the work