All gamblers both new comers and old ones are awared that there are two things in gambling either to win or to loss so there is no too much awareness again about the dangers of gambling. They are already awared before coming to the gambling section. All casinos are meant to make profit so if they are meant to beat you then it is their luck and if you beat them then you win. And that is why before you play a new game in casino site, you have to read the T/C and probably if possible learn how to play the game before playing the real game so you will know how to play the game. The things Op mentioned before navigating to a casino site are all God to know before embarking on the casino site.
Gambling is not just about winning or losing, but how do you keep your mentality stable too, even if you win big but if you can't withdraw your money from the gambling site then it's pointless, i'm sure the majority of people who get stuck in withdrawal problems on a gambling site because they didn't read the TOS first are beginners, usually they are lazy;
1. find out the reputation of the online gambling site
2. check the reviews and legitimacy of the gambling site
3. check the age of the gambling site
4. ask other members whether the bonuses offered are legit
5. read the Term of Service