So learning about bitcoin wallets is not a prerequisite to getting started in bitcoin, even though learning about wallets is an important and powerful thing.. .At the same time, some people might be challenged in their abilities to learn about bitcoin wallets and to put their learning into practice without screwing up.
You are right Sir, I still remember when I started my journey in Bitcoin, everything was done in exchanges include storing the little Bitcoin I had then. I never knew the risk though because I felt the greatest task was protecting my login details to the exchange. It was after reading through things in this forum and also when my money increased I saw the need to adopt self custody. The news about hacks of exchanges were actually good motivation for seeking alternative means of protecting my Bitcoin. So then I started with Trustwallet and later learnt about the risk and the need to go for open source wallets. That was how I kept adapting and I can tell you that the entire thing was a learning process and the good thing is that I was already invested in Bitcoin while learning and this made me take the learning seriously because without financial commitment, you might not really have first hand experience.
Even if someone learn about the various wallets without starting with the least amount as investment, such knowledge is not considered effective. Start buying Bitcoin and the learn various ways of improving the process like choosing better storage systems and ways of buying to maximize the amount you can acquire.