Yes, that's very right, Investing in bitcoin without in-depth knowledge will not be a big problem because every new investor must know bitcoin from their friends or from social media, when the first purchase is made that is the initial stage for them to approach bitcoin. As you said, early investors do not understand bitcoin, but they buy and hold and their knowledge will increase throughout the journey day by day.
That also applies to new investors, they want to invest in bitcoin, even though they do not understand much about bitcoin but they have a lot of time to learn about bitcoin.
The investor's journey in investing in bitcoin only needs to know about the initial steps, namely buying on a trusted exchange and withdrawing it to a personal wallet, that's enough for the initial stage before they learn along with the accumulation they do.
Even if they don't know these initial steps or can't do the initial steps themselves, they can enter the investment through a trusted friend/reliable person. Basically when you plan or decide to invest you should not delay at all. But you must be an expert and learn the basics very soon. Because you should not depend on others for a long time.
Later when you are able to acquire basic knowledge and can make your own purchases then you should continue to try to gain knowledge about Bitcoin, because in order to manage investment you need to know what Bitcoin is and how to invest in Bitcoin and when to take action. I consider it essential to gain knowledge on the subject.
You don't need to be an expert before going into Bitcoin investment when it comes to Bitcoin investment I don't think anybody is an expert because as an expert you must know when Bitcoin will dip and when the price will go higher too it is important to have some basic knowledge about Bitcoin investment but not trying to figure out everything about Bitcoin before starting your Bitcoin investment journey for you can get started and figure out more about Bitcoin when you are already into it.
Bitcoin investment doesn't require you to be an expert before starting Bitcoin investment.