Cracker and Backpage are generally bullshit. Lot of reviews on here from brave bros truly punting and sussing these ladies out.

Wechat I can't comment, but bros on here seem to have luck with it.

For your first FS punt, just go to a shop. Pricing is clear and standardised, mamasan/papasan should be able to get you a girl based on the service you're after. Yeah, the girls see a lot of blokes per day, but they shower before and after and get checkups (well, in some shops).

Personal opinion, Ginza is the best shop in Sydney. I've never had a girl who wasn't a glamour and didn't offer top service from there.