Study a lot, Andreas Antonopoulos is great, he's got videos and books. Learn all you can about computer security, you dont want to get hacked and lose your investments.
But most important of all, dont drink the kool-aid. What is common for those new and even for some experienced investors is to get more bullish as prices rise. So they buy more and more crypto the longer the bull market goes, or they have alt coins to be a bigger % of their portfolio as the market rises. So they will have the most risk when the market tops, when the bear market arrives they get destroyed, panic and sell
This is a counter-cyclical market, you have to be a bull when everyone is in panic and a skeptic when crypto is super mainstream. I dont think we're are there yet and its more an art than science to know when to de-risk but its what works