I think you don't need a gym to stay fit. You can train your skills anywhere: at home, school or work. The best way to start is do any sport activities: For example, walking. You can do ten thousand steps everyday. Also,what is important is to stay active : do not sit too long. Every hour you need a stay active. Standing is more healthy, than sitting. It is a start for good health. After that you can do some further sports: running, swimming or any other . But remember: morning work-outs are really good activities! You need it everyday! This activity helps your brain, health and body. It is also important to drink water after you wake up. It helps your heart and stomach.
I think these simple actions can improve your life and make you fit.