The most important thing in investing is to start investing consistently, regularly and in a planned manner. You should not start Bitcoin until you know everything, it can be an unnecessary obstacle.
I think you are missing something in this comment. Before you start investing in Bitcoin, you need just the basic knowledge of how/where to buy, how to withdraw, choosing the right wallet and other basic safety measures. The most important thing in Bitcoin investment is to only use discretionary income, this will save you from a lot of troubles. If you don't have discretionary income, then it is time for you to work harder to raise it because that is the only money you can put in Bitcoin and it will stay in Bitcoin without you feeling the urge or pressure to sell your coin. With discretionary income, you will also learn to be patient when the market drop below your entry point.
The second most important thing for a new investor is to start working on emergency funds. When emergency funds is in place, the investor will be able to protect the Bitcoin from being sold when they encounter emergency that was not planned for. Every other thing builds on these two ideas to make the Bitcoin accumulation process excellent for the investor.