[Laqswrnm]

The first man Prophet Adam (AS) also gave the dawah of Islam.
Islam is not even a religion it's a deen too and that is it's +point, all of the other are just religions but somewhat corrupted.

The previous Holy books ie ; Psalms , Torah , Bible were Kitab ullah but Quran is Kalam ullah + kitab ullah.

Hazrat Ali (RA) said, When I want to say something to Allah I start offering prayer but I want that Allah say something to me I start reciting Quran.

I don't know what is the story behind Sikhism & how it was originated.

To get closer to Allah is the remembrance of Allah