how to become an actor!??

The steps to being an actor are the steps you take.

Acting is usually one of three things: a Hobby, a Lifestyle and a Career.
Already because of the three different meanings there are three different paths. In short, no path is the same and what worked for one person mightn't work for someone else.

Anyone can pick Acting up as a Hobby.
Whether it be picking up a script, grabbing yourself a camera, acting it out, filming it then uploading it to YouTube. Or seeing an audition notice in a local newspaper for an upcoming play, contacting the director, attending the audition and seeing how it goes.

As a Lifestyle, you've decided that Acting means something more to you long term.
Therefore it may be in your best interest to get involved with Acting Classes, Acting Schools, become a Member of a Theatre Company to generate more regular Acting Opportunities. Though how you enjoy Acting as part of your Lifestyle is up to you, same as enjoying Exercise as part of your Lifestyle.

If you're really serious abt it then go for a theatre or Acting School (Recognised) and get your basics done....groom your self with good looks, get beauty tips from best spa or salons.......try to contact a best photographer who can get good snapshots.