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. 
The question is, op, what crypto coins do you want to buy right now? where is it categorized? you should know if you want to prioritize layer1, layer 2 or meme coins? To know the layers 1 here it is, just read it and it's up to you to choose from the link I'll give you https://www.techopedia.com/cryptocurrency/best-layer-1-crypto-projects
Now if it's layer 2 this is the link you can choose https://coinranking.com/coins/layer-2 and when it comes to the top meme coins it's also https://coinpedia.org/information/10-top -meme-coins-with-substantial-growth-potential/