Basics 
   he fundemental principles of Islam are 5:

1. To profess the shahada
2. 5 times daily prayers (solat)
3. Fasting on the days of Ramadhan(Shawm)
4. Compulsory annual elm(zakat)
5. Performance of Haj in one's lifetime if affordable.

Most important and the easiest of all is the shahadah; to accept the Unity in God and the prophethood of Muhammad s.a.w