Da'wah strategy

As-Salamu `alaykum. I have some questions regarding the history of the Islamic nation. By faith, I am a Christian, but I believe in learning about other cultures and religions in order not to be ignorant during conversation.Here are my questions:Who founded the Islamic religion? Do you have a leader today (Catholics have the Pope, etc), and how big is the Islamic religion? Also, is there an Islamic International Headquarters and a National Headquarters?This information is to be used for a paper that I am doing for school. The class is religion and philosophy. I would appreciate any information you can give me or any recommendations to another web-site I can go to. Thank You.

Dear scholars, as-salamu `alaykum. Some of my Canadian friends always ask me about Islam. Their most confusing question is: Why would a good non-Muslim person go to hell when all he did in this life was good deeds? Why would God punish a Christian or a Jew if he/ she was born into his/her religion? Jazakum Allah khayran.

Dear scholars, As-Salamu `alaykum. Da`wah camps are set up by groups of committed youth for the purpose of offering Dhikr, performing night vigil optional prayers, and giving lectures on matters of religion. What is the legal ruling on such camps? It should be born in mind that these camps are an important means for calling youth to the right path, and that no activity in these camps involves an innovation in religion. [If they are lawful,] what should be said to those who claim that they are a kind of innovation in religion? What can we tell them to prove that these camps are lawful in Islam, for they ask us to give them religious evidence in that regard? Jazakum Allah khayran.

Dear scholars, As-Salamu `alaykum. I am Canadian, raised Muslim, but I attended Catholic school from kindergarten till OAC. I myself have difficulty following Islam, but I do understand the religion very well. My question is, all of my friends are Catholic and I feel by compassion that I should teach them Islam. Should I teach them or not? If yes, how should I? As well, if I was to end up marrying a Catholic woman, isn't it fair to her and the children to teach them Islam and Christianity? Thank you. I hope to read your answer soon.

Assalam-o-alaikum,I just wanna whether we can take help from local maulana to change the wrong mindsets of somebody. if we are sure some muslin has mindset which is not according to Islam and its impossible to make them understand or change their mindset,so in this case we can use some dua and quranic verses to change it. Which dua will be helpful to change it