After two years as a security guard, I really don't want to do it again. I'm really tired and annoyed. What should I do, but I can't do anything!

Can't you learn? Pick a career you like, and then study with friends. Two people are better than one person, at least not one person. Learning is like this. Calm down. If possible, eat, drink and have a good rest, so that boring study, work and life become a little easier, and it will take a long time to learn what you want to learn.