cost? scam? believe? Data cocoon room? This is probably why we are afraid to buy new coins. So, starting tomorrow, I plan to take the first step to learn about an unknown coin. Everyone is welcome to recommend, and the flag is set here.

It's worth it if people are afraid of the scam and performance of a new coin/token. Many have lost money due to that, people should even be more thoughtful about this and be careful as well. But this should not stop their blessing if they are wise, they only have to be smart about it as new projects even give more money than the old ones in many cases. However, I prefer crypto investors to mix the old and new ones together, and the investors that have nothing as much as 10 coins/tokens are still not serious about the crypto investment. This is to outsmart the market because no one would know certainly how the coin/token they possess would behave, which is why buying about 10 of them together can help you average their performance without any issues.
Some would indeed perform better and some would perform less, and when you choose rightly, even the least performing ones would be worth a fortune. Now, about the new coins/tokens, I advise you to wait until such projects are listed on a reputable exchange, and still watch the behaviour for a while. You should try to know the brains behind them, the community they were able to build, the money raised so far, the condition of the trend and all that.
Also, these days, if you must invest in new projects, you may want to study the new ones listed by CEXs, they may not disappoint you in this bullish season. But I warn you, they could be dumped pretty fast during the bearish season, but that can't be earlier than the second quarter of 2025.