Grab a HUD at the starting point (you may want to descript a bunch before going, there is a script limit!) and play the game!
Tips for playing the game: Walk everywhere, do not cam! (Your HUD will light up red in the center when you are walking close to a coin, for one, but you will also get more of the full effect if you walk around!) Touch everything. Talk to everyone. Follow what they tell you when applicable. (And talk to people again! Sometimes they have more to tell you!) To save your progress in the HUD, remove it and reattach it periodically (say, after you finish each quest), so you will not lose ALL your progress if you have a hard crash (sadly, it's just the way SL works, things don't get saved properly until you take them off, and if you crash too hard it can't send the information to save). If you get stuck, people are helping in the O R I G A M I Group, and there are a lot of English speakers playing so you may find help on the sim from fellow players. And above all, have fun!
ORIGAMI RIN-NE is open until August 25.