As a new investor I can say that if you want to hold bitcoins, you should hold bitcoin in DCA method.
Holding of bitcoin does not require any method. The DCA is not a method of holding bitcoin rather it is a method of buying bitcoin at a certain interval on a regular basis.
As a new investor I don't think it requires much knowledge.
(Though the saying goes that knowledge is king)
But once you go to the market, you can learn all kinds of things by yourself.
Yes as a newbie all you need is the basic knowledge of knowing how to set up your wallet and how to buy bitcoin from exchanges both Dex and Cex and knowing who to withdraw your bitcoin to your wallet. Also to know that you are not to keep your coin in an exchange for long because it's dangerous.
DCA is a good strategy for holding Bitcoin.DCA means buying and holding a fixed amount of bitcoins every week or every month. You invest 1/3 of your income over a period of time. You cannot hold on to your entire income or invest too much at once. At any one of your perils you feel like withdrawing this full amount.Which will go against your dream of holding bitcoin.
Once again DCA is not strategy of holding bitcoin, It is a strategy of buying Bitcoin. Another mistake you are making about DCA is were you are saying, buying a fixed amount of bitcoin every week or month. Instead of fixed amount of bitcoin, it is a fixed amount of money.
I think you are getting it wrong that DCA strategy is not for holding because on the contrary is intertwined with buying and holding because is only those who intend to hold Bitcoin for a long time that intend using DCA strategy as there method of buying Bitcoin. However I agree with you on the aspect you mentioned that it may likely be very difficult buying the exact amount of Bitcoin on a weekly basis, yeah of a truth it could be challenging buying the same exact amount of Bitcoin every week considering the price movement of Bitcoin, perhaps let's take for example your last buy was when the price was at $40k and maybe before your next buy the price gets to $46k however considering your weekly budget it will be very difficult getting the exact amount of Bitcoin of your last buy on less you have enough funds to be able to adjust your accumulation budget as the Bitcoin price increases.