DEXs are not any more complicated than CEXs. Different, yes. But that doesn't mean more difficult, it just means different to what you are used to. I would argue that having to create an account on a CEX, and then send off all my documents and a selfie while holding today's newspaper with the name of the CEX written on it, and then wait 5 days for approval, and then have to do a video confirmation, and then wait another 5 days, and then link a bank account, and then wait 3 days for my transfer to clear, etc., etc., is significantly more complicated than opening a DEX and being ready to trade in 5 minutes.
There have been literally billions of dollars worth of crypto stolen via CEXs, and millions of users have had their private information leaked, hacked, shared, or sold, via CEXs. With a DEX, not only have such attacks not happened, but such attacks are largely not even possible since you don't hand over your data or your coins in the first place.
Would I ever suggest to a newbie starting with a DEX? Personally no, I wouldn't, there are too many risks, before that person needs to understand how the crypto world works, and I doubt that someone completely new is in such a hurry he can't wait for their KYC to be completed... CEXs for me are the best starting point, let's not forget that there still are thousands of people who still give away their seed to some fake customer service representative on Telegram, can you image these kind of people on a DEX?