The way to convert to islam is the same. You say shahada: La illahah illa Allah, Muhammad rasul Allah. There is no God but Allah, Muhammad is his Messenger. But the way to Islam is not the same. Read and watch videos of some of the converts that are around the world.
Tim Chambers from Ireland is a convert to Islam. He was brought up Irish Catholic. At age of 15 he ran away from home. He had a step-father, living with him and his mother, who beat him. His father was absent. He fled from home and had seventeen addresses where he could stay. He became depressed. He started to think that he had to find the real him. He get back into school. He chose to study politics at University. The reason to study is normally to have a job and marry. But he did not. He chose to study to find himself. He read all the things Mahatma Gandhi had written. He liked this man and started to act like him. He then read about Tolstoy and started to act like him. He once asked a socialist why he wanted to help people and so on. The answer was that he wanted to have a bigger house and car. He then read about Buddha and started to act like Buddha and started to meditate. They said to him to contemplate on the "Supreme Nothings". He could not believe that so he left the campus. He then attended a Christian meeting when somebody went up on stage and started to play on a guitar. He then experienced somebody starting trembling in the middle of the crowd. He freaked out and ran. He then had a girl-friend and she said "time has changed" because her religion has said her that. During ten years of researching he only found islam and muslims through his girl-friend, that wanted to leave him. He was told to read some books. He started to read the Qur'an during the time of Ramadhan. He fasted one day at the end of Ramadhan and then took his shahada.