First of all, newbie shouldn’t join with new altcoins token ico.
And newbies should also know that most of the ICOs today are not that good anymore. Many of them are outright scams, although there's still a place for them but it's known by the community that most of them right now are scam.
Cause its quite impossible for them to find out good project with first try. Scammer are very smart to fruad with people. So first notice on those altcoins who were get scammed. Then try to Find out Their ways and reason and try to learn something from those. Then you’ll automatically know if the altcoin is going to scam or not
It's quite hard, to be honest, but there's a way to know it if you're always that type of person who seeks that information just as the goal of the project and how they're marketing it. If there's a sign that the source and its goal doesn't really look viable and sustainable, you can have that idea what it is.