Your choice of exchange go depend on wetin you dey find, if you dey find liquidity and you no really care about submitting KYC, then centralized exchanges is for you. That said, if you no wan give any third party your information, and you no wan make any third party dey in custody of your money, then na decentralized exchanges you go use.
Remember say dem no dey keep crypto for any exchange, whether na centralized abi na decentralized, keep you coins in your non-custodial wallet, and use exchanges to trade only.
Using a DEX or CEX is a choice but from my observation many crypto users prefers CEX, despite the requirement of submitting KYC, it is still used by most crypto users. So if I'm to judge by my observation I will say that CEX should be better than DEX but I might be wrong. My focus is that no matter which one you choose between the two forms of exchanges it is important not to leave your coins in any exchange, except the one that you want to use for p2p transactions and trading. If it is not your keys it is not your coins, hold your coins in a none custodial wallet.