Assalamu Alaikum brother, contrary to popular belief you do not need an imam in order to convert to Islam. To become a Muslim one must simply say the testimony of faith, also known as the shahada.
Which is to say: "Ash hadu alla ilaha illa Allah, wa ash hadu anna Mohammadan abduhu wa rasooluh." and in English it means, "I bear witness there is no God but Allah and I bear witness that Muhammad is the slave and the messenger of Allah." (saws).
However though, I would suggest going to a nearby mosque to make it formal. And you can also post as an anonymous member in the "Advice and Support" section of these forums to seek the advice of both the brothers and sisters alike, inshaAllah.
And Alhamdulillah you have started praying as well as Prophet Muhammad (saws) says in a Hadith, "The superstructure of Islam is raised on five (pillars): testifying that there is no God (none truely to be worshiped) but Allah, and that Muhammad is the messenger of Allah, performing the prayer, paying the Zakah (poor-due), fasting the month of Ramadan, and performing Hajj."
InshaAllah may Allah make it easy for you and inshaAllah may Allah guide us all, ameeeeen.
Assalamu Alaikum