Wow that is amazing! Well what I'd say is look through interesting topics on here for a start, check out SikhiWiki it's like Wikipedia but for Sikhism. Also there's amazing lectures on Sikhism on youtube i.e. Basics of Sikhi, Bhai Vijay Singh, Bhai Manvir Singh Khalsa, Bhai Rajinder Singh & Bhai Jagjeet Singh. As for how to approach people i'd say just go for it and ask questions, everyone is welcome in the Gurdwara regardless of race,caste,creed, status etc. Hope this helps & Good Luck! :biggrin2: