Don't persuade me!

You're not my friend so you don't know what I really want. If you want to join any tests you like, don't think I will go together with you. But I'm a little confused that you have the courage to take this test, have you prepared all the courses of the exam? Don't tell me you just want to try. You must know we have few time to do things which we have no confidence. I'm very serious and you don't regard me as a joke. I want to suggest you that don't waste money and time, or you will regret for your unwise actions. And finally, don't persude me if you want to do something.