Absolutely no one should laugh in your face for asking this; in this current world of the internet, it's a valid question. However, you're going to be hard put to find any online vocal coaches. It's not possible to teach someone and show them what to do, online. It's one of those in-the-moment things that cannot be simulated as of yet. However, where are you located? Perhaps people can weigh in on vocal coaches in your area or in the vicinity?

All the best to you,
Jules