I did 1 year of drama at my school, 2 shows, is that enough experience to start my acting career or do I need to take other acting classes?
You should continue your study and take as many roles as possible. Your school drama program is a good start. Also, look for community theaters in your area and see what shows they may be producing and audition. Also, look for theaters that offer classes for students your age.
But while you’re testing the professional waters, keep learning and gaining experience through doing more shows and taking more acting classes. There is ALWAYS more to learn, to understand, to try. Watch more theater, TV and film not just for entertainment, but with the eye of a student. Ask yourself why a performance was engaging. Why was it truthful? Why did it affect you?
It’s a lifetime of learning if you want to be an actor.
Alexis recommends the following next steps: