Having basic knowledge before diving into Bitcoin investing helps avoid common pitfalls. Understanding terms like public key, private key, and wallet basics prevents issues. Also, knowing about exchanges, wallets security, and price volatility can save you from unnecessary losses
What you mentioned above isn't the basic knowledge of bitcoin but the technical aspect of a wallet and it's not needed to get started. What a brand new investor needs to get started is his discretionary income and common sense, to figure out his discretionary income, study his financial situation and how much he will put into bitcoin from his discretionary income. Is it to start slow or not. Common sense will also tell you to learn as you're investing.
You can learn about wallets and how to secure your funds as you are investing with DCA. You can know about bitcoin exchange within one hour. A new investor will become confused and scary in the beginning if he wants to go and start knowing about all those things you mentioned and that might slow them down and that will definitely affect the size of their portfolio in future. It's better to be a low coiner than a no coiner and in bitcoin investment you learn best by pratical.
For instance, people who are new to the game love putting their money in exchanges since they seem to offer the comfort of a bank while they do not know any better. However, lacking basic understanding of what self-custody means exposes you to huge risks of losing your money. When an exchange such as FTX collapses, the "learn as you go" type of person understands much later that they never owned any Bitcoin but rather a "promise of Bitcoin." But by then its too late - your money is already gone.
Keeping your funds with a third-party service in the beginning of your bitcoin investment does not mean that you will lose your coin instantly, it's when you turn the exchange to be your long term storage that your funds are not safe.
You should know that the moment an investor with common sense and is using his common sense will be properly careful to make sure that he doesn't lose his bitcoin the moment his bitcoin investment is increasing in size and that will make him look for a more secured way to store his coins. Since he is DCAing and learning at the same time, he will have the chance to learn about noncustodial wallet and which one will suit him best.
One advantage of piling up your purchased bitcoin in an exchange till it gets to $500 and above before sending it to your self custody wallet is to avoid having too many small small transactions that might end up eating majority of your profit in future if transaction fees becomes extremely high.