In a nutshell, we try to avoid rules.
- The articles should be slightly related to money
We use the same software as Wikipedia and over there you can find excellent information to get you started with the syntax used here. Briefly, just click edit, start writing and add [[ brackets ]] around terms that could or should be articles on their own, e.g. [[euro]] will become euro.
Apart from that, you will notice that guaka will probably edit your work to give the wiki some slight cohesiveness. You can also ask any questions or leave comments on his talk page - or on the Community portal.