Yea, an investor needs only the basic knowledge of bitcoin and his discretionary income with a long-term investment plan and mindset for him to start investing in bitcoin immediately. Whatever knowledge that he needs can be learned simultaneously as he is investing. This is because some people will have the zeal to start learning about what they're investing into after they have started investing. No need of trying to get most knowledge of bitcoin before investing.
If you are investing into Bitcoin then it's a good thing to get some idea about Bitcoin prior to investing. Once you have your mind clear about Bitcoin then it will help in defining a long term strategy. It won't take much of your time to learn about Bitcoin as there is lot of data already available. Learning about Bitcoin is also important because that tells you that real profit in Bitcoin is in long term investment.
Using DCA alone can give a new investor the opportunity to grow his bitcoin without stress as long as he's using the right amount of his discretionary income to invest. He can learn other strategies of accumulation when he has gotten started, because if they're done in the wrong way, it might lead to loss in his investment.
DCA is best to start if you are new to Bitcoin and with time you have idea on when to go for Lump Sum or Buy a Dip. Key thing is to start investing into Bitcoin no matter what strategy you adopt in the start.