If you want to invest in bitcoin, of course you must first learn how to do it step by step so that your bitcoin investment goes well.
I personally would suggest you to learn about wallets first. Because if you don't understand this, I think it will be a problem. Because a wallet is where you store the bitcoins you have. So don't store the bitcoins you buy on the exchange, because it is very risky. That's why I suggest you learn about wallets first. Then if you already understand about wallets, then you can buy bitcoins on the exchange and send them to your wallet. Also, don't forget to be more careful when you are going to send your bitcoins to your wallet. Because if you make a mistake with just one letter when you enter your wallet address, of course it will result in your bitcoins being lost. That's why when sending bitcoins to the wallet you have to be more careful.
If you are new to Bitcoin investment then it is important to have basic knowledge.
If you do not understand what Bitcoin is, what is the function of Bitcoin, how does it work etc. If you do not have knowledge in all these things then I would say that Bitcoin investment is not for you. .
I'm not in any way trying to promote ignorance or rejecting knowledge, but these things you have listed above is not enough to stop some from investing in bitcoin. These are things that can be figured out down the line while you are already invested in bitcoin or it can be done side by side with your investment. I have seen several situation where total newbies came into bitcoin investment through the help of a colleagues in office or close friends and family relatives and later figure out what bitcoin was all about, and how it works, and it's functions. These are things that can be learnt at anytime. But they ain't enough to prevent someone from owning/ investing in bitcoin.
Believe it or not there is always step to Bitcoin investment that doesntt mean you have to have all the knowledge in the world before starting the investment. Depending on what he meant by step by step as for me i believe a lot of persons here will agree with me that as a beginner in Bitcoin investment or any other investment you need to know what that investment looks like and then know about security as well as risk management because no investment is risk free. These basic step need not to be avoided and it is not good to start your investment without knowing them. Any beginner who start their Bitcoin investment journey without having a clue of what it is will only end up doing things the wrong way. Some of them will be able to fix their mistake while most of them will lose all their money.
Whether Bitcoin or not it is wrong to start anything with no clue at all. Since investment is risky it becomes more risky to invest in something we know nothing about. Let us be honest, as a farmer you cannot know the right tool to take to the farm when you dont know the crop you are going to harvest. Same thing goes to Bitcoin investment you need to know what it is all about then kick start but that doest need to take forever. The basic of Bitcoin investment tis simple to comprehend.