Welcome to the site and fandom.
You certainly picked a good story to start off on. I remember the joy of reading Past Sins the first time.
If you want to continue there are lots (literally fucking thousands) of good stories on this site. But I wanted to point out that Past Sins does have some damn good sequels located on this website they follow Nyx and her family through some damn good adventures. I wanted to point this out because they used to be on this site.
Anyway have a good time