How can I live up to this?

I just joined Orchestra today, right after the 4th quarter started. I also just began playing Viola day before yesterday. For festival and the end of the year concert we are playing, Fantasia For Strings, Viva la Vida, Eine Kleine Nachtmusik (the 1st movement), Momentum, Symphony #9 and Rosin eating zombies from outer space. All of these pieces are beautiful, and i have to learn how to play them ALL in 3 weeks!!!! Any violists with tips?!