How can you become telekinetic?

You don't. Telekinesis isn't actually a power that human beings have.

You must also surely realize that if anyone on line could "give" you the secret, if it was truly something that you could just "become", then there'd be so many telekinetic people out there right now, that we'd all have heard of them.
You can't. Unless you have a natural predisposition for it, you will never become telekinetic.