Hi Paul, welcome to Alliance!
These adventures are by group reservation, like tables at a restaurant, if you want to think of it that way.
On Sunday at 12:30, there is "A Day in the Life of Acarthia" which is designed for new players, and is an "open table," using my restaurant metaphor. That is the singular module that is designed specifically for new players, to demonstrate some of how the game works, introduce you to its story elements, and which is leveled appropriately for starting characters. If you are free to come out on Sunday, that is the module that you and your brother should attend. There's still time! We'll work out the details.
The other modules on Saturday, and other time on Sunday are reserved by their respective parties, and attending them would be like sitting down at someone else's table at a restaurant. With advance planning, several of those groups would've been happy to welcome new players, I'm sure -- but this close to the event,
the Sunday adventure at 12:30 is the reasonable choice.
(BTW, I've read this adventure write-up, and it's so fun that I wish that I could sneak in with my more experienced PC because I think this is going to be delightful!)
Here's what you need to do right now:
You and your brother may borrow boffer physreps from the game for your first adventure; don't worry about that.
If you need help with any of these steps, please check out our Facebook group, "Alliance LARP Denver." Our community is really friendly, and you'll find a lot of help there when you have questions. Please feel also to reach out to me on Facebook through private message if I can help you further right now.
Trace Moriarty
Team Prometheus
2017 Acarthia Plot Team