You used to be able to pay your way into p411 but now you have to have references, which can be near impossible when you're starting out as most Indies won't see you without references. They also want work references which is a little extra imo, and also a barrier if you don't have an office or something like that they can call to verify you.
Eros is good with fairly accurate pics and more importantly personal websites of workers, who may be more lenient with references and verification.
Switter I haven't used much at all, but it's been pretty good at finding local providers, so long as you can navigate it, which can take some getting used to
BestGFE is also full of nice providers, have often seen people going there to set up meetings with women who will then become a reference for future appointments elsewhere.