Going to play on a newly established gambling site we are not necessarily at higher risk than when we play on an old and well-known one. What we must do before registering on a site is to check for reviews and other info. The new site can be opened, for example, by a known and respectable owner of other site, and if that is the case, you are not risking much, registering in this site.
Reviews can be very helpful in making a decision to gamble on any newly created site, but don't trust them much. In such cases, I usually trust only people whose reputation I know well and respect. Well, of course, you need to use small amounts for a deposit, do not transfer large amounts to where they can disappear completely.
It is better to trust people who are often playing gambling in the gambling site than to trust from the reviews because they can use fake reviews to make their site looks legit. Using small amounts for deposit will be better too if you want to check on how good the site so you can feel safe when you continue playing the games. But don't forget always to take care of your money and never use big money to play because playing gambling can risk all the money you have and you have a chance to lose all the money.