Contests come and go, some are expensive, some are cheap, some are too big or small. But this contest for novelists seems like a good fit, if you’ve never been published.
Killer Nashville is a mystery convention in, of course, Nashville, Tennessee. I have no affiliation with them. But they are worth a look if you trying to get your novel manuscript in front of agents and editors. Here’s the link:
Killer Nashville Claymore Award. Good luck!