As some body that is still learning to invest into Bitcoin you don't even need to learn about wallet, because wallet are technically things which you don't learn under hurry. You take your time to learn them. But first you should use wallet to store your Bitcoin. If you are looking for a good wallet to store Bitcoin I think you should download the Electrum wallet, after creating a new Electrum wallet write down your seed phrase and keep them in a safe place. Don't safe it on your phone and don't keep it anywhere somebody will see it.
I disagree with you on this one; you don't need to learn about the technicality of a wallet before you know about a good wallet to use. Someone who wants to learn about the basic knowledge of Bitcoin needs wallet knowledge too; if they don't know about wallets, they won't be able to know how important it is to safeguard their phrase, the difference between an exchange and what's regarded as a wallet, the need for self-custody, and the rest of the little things that can safeguardtheir asset and give them total control of their investment.