Native English language speaker looking to help more people become bi-lingual

A recent business school graduate who has realised that it is challenging for people to communicate in the English language. I have taught people English and Basic Mathematics in an informal way while volunteering. I want to use that short but meaningful experience to aid people who want to learn a new language.
I truly believe a multi-lingual world where English is a language that is understood by most would not just help more people but would also cut barriers and help in more cultural integration.
My purpose behind this application is to:
1) Re-live the teaching experience which has always brought me pleasure and taught me a thing or two.
2) Help people master a language to feel better about themselves.
3) Enable a world where communication is seamless.
4) Meet exciting new people.