To be sure try to make better enquires, just for your understanding any centralized wallets shouldn't be used to hold Bitcoin, take a look at some recent hacks in centralized exchanges doesn't make it safe to store your Bitcoin with them.
We usually use the terms "custodial" and "non-custodial" when comparing wallets, not the terms "centralized" and "decentralized".
If you have access to your private keys, the wallet is non-custodial and if you don't have access to your private keys, the wallet is custodial.
I understand that lack of early knowledge either as Beginner can affect your choice of holding and ways to go about holding in more secured system, Trust wallet can be preferred, make sure to keep your keys private and wallet offline to avoid online attacks or phishing.
Trustwallet?
Trustwallet is also close-source and like coinbase wallet, it should be avoided too. There is no way to know how the keys are generated on trustwallet and whether the keys are strored on their server or not.