How did you get discovered? Or became an actor?

You become an actor by acting.

Start with your local community theater and/or area theater troupes. Audition often, even while you're not very good. Ask actors that you see at those auditions (especially those who are good) where reputable acting classes are and then take them.

Study good actors. There are online master classes from actors you can watch. Take an improv class (or two).

In other words, treat acting like any other art form: study, practice, work.