the main thing about islam is that there is one god. and created every living being. he put us on this earth to test us if we r worthy of his heaven or not.
he sent prophets to the people to guide us. like arbraham and jesus. and the last phrophet it mohammed *pbuh* and we basically use the quran which is the last holy book sent by god to mohammed and follow his teachings of islam.
islam as a word is meaning to serrunder yo gods mercy and love.
hop that helps u out