Beginner here. A few lessons I learned the hard way.

When making your intial investment, don't invest everything in one lump sum. Feel out the market and invest small amounts over a period of days/weeks. And then DCA after that.

Don't chase pumps. Yeah, did this one too. Saw a coin going up and tried to get some quick cash. What happened? I caught it at an ATH. Now I'm in the red because I went all in on ETH. I know it'll come back up but it'll take me longer to see gains. But, with things going back up this evening I think I can see you all on the horizon headed back my way.

If it goes up fast you better believe it can come down fast. It's volatile. Crypto is not a get-rich-quick thing. It can certain happen but there are no guarantees and there's a lot of risk. To be safer, understand that this is a mid to long term deal. Meaning, bare minimum you want to keep your money in the market for 6 months to a year. The longer the better. Invest in solid coins.