Salaam;
it's simple.
U have to believe and give the testimony that there is no god but Allah and Muhammed peace be upon him is His last Prophet .
Pl. browse the forum . We have many converts here . I hope , u will have fruitful discussions with them .
Some related info :
Allah says:
"This day, I have perfected your religion for you, completed My favour upon you, and have chosen for you Islam as your religion" [Quran 5:3)
Allah gave this favour to the whole of humanity. Therefore any one can become a Muslim no matter what his/her race, language or colour is. No matter whether they are single, married, divorced or a child.
All sins committed before coming to Islam are forgiven. One who converts to Islam is totally reborn and starts with a clean record.
Common Questions:
Can any one become Muslim. Does it matter what race are or age I am?There are no Masjids (Mosques) and no Muslims in your town. What to do?I want to become Muslim but I am afraid of hurting my parents. What should I do?I want to embrace Islam but have been advised to wait. Should you wait?I have a wild past can I become Muslim?I have tattoos can I still become a Muslim. Islam wipes out all sins before converting to Islam.Do I have to change my name?
HOW TO BECOME A MUSLIM
It is easy to become a Muslim. To become a Muslim one must simply pronounce the Shahaadatayn (Declaration of Faith) with sincerity and conviction.
The Shahadah is the following :
" Ash-hadu an laa ilaaha illaallaah, wa ash-hadu anna Muhammadan-ar-rasool ullaah " (In Arabic)
"I bear witness that there is no God worthy to be worshiped but Allah, and I bear witness that Muhammad is the Messenger of Allah." (Translation IN English)
http://www.muslimconverts.com/shahadah/converting.htm