Bitcoin investment isn't like a physical business that you need to be pass through the apprenticeship process. You don't need the full knowledge of bitcoin before investing into bitcoin because bitcoin know is broad and cannot achieved in a couple of months.
If you want to start your bitcoin investment, what you need the basic knowledge of bitcoin and discretionary income to get started. You can learn along as as you are investing every week/month with your discretionary income using DCA method for 4-10 years and above because you are investing in a long-term. It's never good to be waiting in order for you to know only the theory of bitcoin but learn by experience as you are buying and learning more about the market and how to make sure that you keep your bitcoin investment ongoing without selling prematurely.
In bitcoin investment, experience is the best teacher because there are some challenges that you will pass through when growing your bitcoin portfolio that is not written down in theory. Especially, the aspect of cash inflow management and how to be flexible on your bitcoin accumulation based on the scenario playing around your financially at that moment.
Waiting is never a strategy because it will prevent you from taking advantage of the opportunity in the market. Bitcoin price and time waits for nobody. Just keep on accumulating and learning in order for you to accumulate a good size of bitcoin stash in the future.
Many would think that they should know everything first before making any move as it has always been but with Bitcoin you may end up missing the waves. No, it is not like running a normal business wherein you need to know all the specifics of the job, before hand. You will be learning bitcoin whilst in it. The secret is to start with small amount and with the money you can spare, and be frequent. No video, no article reading is not going to give you an equivalent of experience as it is. However, it is noteworthy that human beings simultaneously should be able to spend money adequately. No matter how successful Bitcoin is you simply fail to meddle with it at least when you have to manage your money and show self-discipline.