552172 Social Network..

I am looking to create a social networking site for a pretty large group of people. I am looking for something that Looks similar to facebook but has a lot of options like myspace. I love the simple look FB has but I want customization ability on profiles like myspace. I do want some other features though. I need a section that I can use to host webinars almost set up like a tinychat. I am not too tech savvy so I would need something that is easy to use when I want to update the background or post site updates or issues. Thank you