I do not necessarily agree that a new investor should know how to store their bitcoin before starting. It takes a long time to understand self custody, most of us got into bitcoin buying on an exchange and leaving it there until after a while before we knew it was the wrong way to store our coins. Besides, sending your coins regularly to the wallet can be expensive if the fees are high and the new investor would loose a lot on fees, so it is better they consolidate on an exchange for a while before sending to the wallet. They can use the exchange for a while as they're still new and along the line learn better non-custodial wallets to use in storing their coins properly and the right time to send those coins across which is when the fees are low or when they've consolidated for a while, maybe $500 worth of sats so they don't leave much coins on an exchange.
This your idea doesn’t fully sit well with me. Perhaps it is better to start knowing about self custody as soon as you start buying bitcoin
(i can’t emphasize on this enough). You can keep small amounts on an exchange while you are still learning, but your goal should always be to understand how to take control of your coins instead of figuring it out later after you have already built a sizable position.
The fact that many of us left our bitcoin on exchanges when we just started newly does not make it the best approach, it’s just how we learned our own and it was kind of the easiest entry point at that time but plenty of people still also learned the hard way when exchanges froze their withdrawals, got hacked, or even collapsed.
The bottom line is that i think a new investor should at least understand the basics of storing their Bitcoin before they start accumulating a meaningful amount. They should know the difference between owning Bitcoin and trusting a third party to hold it for them.