U do not need to go to mosque or witnesses.u can do it now
say al-shahaadatain first, then purify uself for Salat and u can perform ghusl (complete bath) because the prophet (peace and blessings of Allah be upon him) ordered some of his companions to perform it when they accepted Islam.Pls pray for me.Allah is pleased with u and u u supplication are answered.
he Shahada can be declared as follows:
"ASH-HADU ANLA ELAHA ILLA-ALLAH WA ASH-HADU ANNA MOHAMMADAN RASUL-ALLAH".
The English translation is:
"I bear witness that there is no deity (none truely to be worshipped) but, Allah, and I bear witness that Mohammad is the messenger of Allah",
However, it would not be sufficient for anyone to only utter this testimony oraly either in private or in public; but rather, he should believe in it by heart with a firm conviction and unshakeable faith. If one is truly sincere and complies with the teachings of Islam in all his life, he will find himself a new born person.
do not delay becoming a muslim for this or any such reason. After you become a muslim, then you are held responsible for learning when and how to do salah and wudu, acting upon the pillars of Islam and faith, and for implementing what you learn, when you learn it.
http://www.youtube.com/watch?v=ztrkhOddGpE&feature=related