There is no reason to learn all of the things that you mentioned prior to getting started buying bitcoin. The more basic things to figure out is whether you have any discretionary income or not, and once you figure out that you have discretionary income then to invest into bitcoin from within the boundaries of your discretionary income. .. and sure at the same time, any newbie will have to figure out from where they need to source their coins.
So, even if each person needs to work on learning about bitcoin, learning about wallets and learning about various aspects of their cashflow management, these are not needed to be learned and/or perfected prior to starting investing in bitcoin, yet surely the more that any of us invest, the more we likely need to make sure that we are comfortable with various of the details. We may well then be in a better position to start out our bitcoin investment conservatively and to work up our level of bitcoin investment as we become more comfortable and more knowledgeable.
Some people spend all their time learning about Bitcoin instead of to start investing or look for a stable income to start investing which is the basic thing and then learn along the process, the first thing any investor should have before even having a broad knowledge about Bitcoin is the capital for investment not even capital but steady flow of it cause it would help them do the DCA and constantly buy it overtime for as long as possible.
Someone who doesn't have the capital to start or steady flow of it rather could be forced to sell when they make little profits or during the dip but the more one keeps investing and for longer period it means they have a steady flow of income which is very important and they'll gradually get to know about things like the best place to store their asset, suitable time to DCA and so forth, waiting to learn everything before investing could make one miss out on lots of opportunities moreover what if the price of Bitcoin keeps increasing while they're busy learning, which means they've missed out on buying cheaper, that's why I agree with you that one mustn't know everything before investing just knowing the basic things and having capital to constantly invest is most important.