I think gambling sites are very visible from some of the existing reviews, as gambling sites can not afford to buy reviews, and in real live, gambling sites will get good reviews if they are proven to be honest and pay.
Just I have surfed on Google and found that this site is being useful to find the reviews about the various projects and you can find the more quick guides on the many projects in the crypto gambling industry. Hope this may be helpful for the guys like you.
https://bitcoinplay.net/Even I have created the thread on this section to understand which is more trusted to gambling. Reviews may work better to learn and earn in gambling.