see Phantom of the Opera in London

There’s a concert in London March next year that I want to go to. I could go see Phantom of the Opera while I’m there but it’s quite sad how terrified I am of going to London on my own. It’s not light years away but I’ve never been out of the country on my own before, and I’m scared I’d get lost on the Tube (I don’t understand that thing!) or I’ll get mugged (the TV brainwashes you about gangs and what-not) or I’ll have a horrible time because I’ll be all on my own and have no one to share it with. =S I honestly don’t know.