If you are a Muslim, the least you can do is this:
Tell all those you can, all those you know and all those you meet,
whatever you know, whatever you can, about Islam.
For, an important requirement of being a Muslim is to tell others about Islam. To show others what Islam is all about.
According to the Hadith of Jibraeel (Alaihis Salam), Islam is Shahaadat, which is "Bearing Testimony," as so many people translate that expression, but which in simple, straightforward English is "Telling Others" -- Telling the Whole World -- about Islam.
La Ilaha Illallah,
Even though this is the work of a lifetime, this is the least that is expected of you if you want to qualify as a Muslim: Tell Everyone about Islam.