:salam2:
Dear Brother,
Welcome to Islam and to TTI.
To convert you do not need any person or anything. You can take Shahadah alone with Allah (SWT) as your witness and you are a Muslim.
All you have to do is to believe in Allah as One True God, and believe in His Angels and His Messangers and his Books and on the Day of Judgment.
Then say: "I testify that there is no diety worthy of worship than Allah and Mohammad is his slave and messenger."
In Arabic "Ash-hado unlailaha illalaho wa ash-hado anna Mohammadan abdohu wa rasulohu"
And you are done.
Then do not do the haram acts and do good deeds and try to learn the prayers and read Quran and InshaAllah you will go to the Paradise.
It is always better to take Shahadah in front of others but it is not mandetory. You can also take a ceremonial shahadah later on in a mosque etc again when/if possible.