Currently there are 18 of us who joined. If you didn't participate in the previous incarnations of AoC and you don't get what all the fuss is about, I'd recommend you to solve some tasks from 2017 (or earlier) to get in the mood and join us this Saturday.
Usually first few days every year are easy tasks for warming up. If you want to challenge yourself, take a look at [2015 day 19](https://adventofcode.com/2015/day/19), [2015 day 22](https://adventofcode.com/2015/day/22), or [2016 day 11](https://adventofcode.com/2016/day/11), to name a few.
