Hey, Futuremarius! Nice to meet you, and welcome!
Wow, that's really, really cool! Man, how much I'd love to do Les Mis...
And you're playing Marius? That's amazing; congrats! Good for you, too, wanting to make your own things. Well, I'm no expert, I know, but I'd be happy to give you any advice that might help a bit. Is there anything in particular you want to know? Patterns, general ideas, a little info on 1830s clothing, etc...? I will warn you in advance I don't know how to use a sewing machine, yet, but I'd be glad to offer what little I do know.
Also, maybe you'd like to make an introduction thread for yourself in the intro forum, so we can say hello to you properly?