What is something crypto related you still don't understand

I have been in crypto for a year or so and do research before I buy new coins for while and I have to be honest there's still a lot of technical aspects i don't understand. The main one is the blockchain and blockchain technology. I am still unclear on how new blockchains work and how they are used for cryptocurrency and development of new blockchains. I've read multiple descriptions of it but I still don't get it as in layman terms. Are there any topics that you are too embarrassed to ask. Please share I'm sure there are some beginners here too who don't want to sound like a newbies.