How to become an actress?

Cool! Its great to see people taking such a positive approach towards acting! I'm guessing you're a teenager so I would suggest getting into a youth theatre. Google what's happening in your area and if you cant find anything, visit your local playhouse to see if they offer youth theater or know of any good ones. Getting into this sorta thing is good because you meet the right people, gain lots of valuable experience and skills and also get to put on plays! I think this would be a good place to start before getting an agent, as they will need to see that you have a solid experience in acting. Also, youth theater coaches can write letters of reccomendation to future employers and directors which is a great push ahead! Best of luck to you.