From what I have been reading through in previous pages, I think is not necessary to know all the things related to Bitcoin before starting Bitcoin investment. Perhaps even an old investor cannot know all the things related to Bitcoin since Bitcoin is still a growing asset, in our best interest it is better to start our investment and learn more while we are already investing.
I can't say for sure that you don't need to know everything about Bitcoin investment before investing. You can certainly learn everything before investing if you are not ready to invest. Suppose you know about Bitcoin and have a strong desire to invest but you don't have any source of income or your family situation is not suitable for investment, should you wait to start investing to gain knowledge about Bitcoin and investment? My answer would be "No". I would say that you should start gaining knowledge about Bitcoin in such a situation that you can know Bitcoin better and have a strong belief in Bitcoin before investing.
If you are ready to invest and are qualified in the matters required to start investing, then you don't need to know everything before investing. Just basic knowledge will be enough. If your situation is such that it is not possible for you to start investing or you are not able to acquire what is needed for investment, at such a moment I cannot say that knowing everything before investing is unnecessary. On the contrary, I support it, because knowledge never goes in vain. However, delaying investment on the pretext of acquiring knowledge even though you are ready to invest may be the wrong step.