It’s worth asking yourself why you’d like to be a curator. Generally, the point of being a curator is to be able to resolve flags. Adding flags shows that you have identified issues on the site that you could help resolve if you were a curator. Rather than trying to seek out opportunities to create flags, I’d suggest just using the site until you get to the point where you are noticing lots of things that you’d be able to fix as a curator. At that point, you may be ready to be one.