Investment has to start with good understanding about Bitcoin fundamentally, as well as knowing about its risk and chance to get profit. All things need to be based and learned from Bitcoin white paper, available learning resources for beginners, and historic price and ROI of Bitcoin.
After have good knowledge about Bitcoin, it's time to find a good investment strategy, and among many strategies, Dollar Cost Averaging is a best one for almost all investors.
https://dcabtc.com/https://costavg.com/ I do not think that the things you mentioned can be very important to start investing in the initial state or learning the things you mentioned can be very important. I am telling you to start investing in Bitcoin, first ensure only a little knowledge and a consideration source of income. Maybe through this you will be able to continue investing continuously. If you start investing once you start investing, you will gradually learn more about investment and be able to collect all information about Bitcoin. For example, as a student first becomes educated after admission to school, it is just as investment, when an inexperienced carrie starts investing then he gradually becomes experienced in investing. But in the beginning only you have to start with interest which is very important for you, you can start with a small amount of money.