You do not need much to invest in Bitcoin. If you have a reasonable income, basic knowledge about Bitcoin and faith in Bitcoin. If you have these things, then you can invest. After starting investing, you can gain technical knowledge. If you delay investing to gain technical knowledge, it will not be the right decision at all. You can learn a lot after investing. First, you need to start investing.
I agree with you to an extent, but not on the part you said that
if you have a reasonable income, because in my own understanding, you don't need a reasonable income to invest in Bitcoin, what you just need is a discretionary income, if you can figure out your discretionary income, buddy you are good to go, no need in wasting anytime in investing, why most Bitcoin investors are having troubles in the accumulation and holding journey is that they still can't figure out their discretionary income, they still partially invest money meant for other basic needs, and when the need arise to use the money, they will fall back to their investment and retrieve back that money already invested in Bitcoin, which result in selling at a loss or sell prematurely, so if we can only be investing from our discretionary income and we do not fail to put our emergency and reserve funds in place in case of unforeseen emergencies, nothing is stopping us from not being successful in our Bitcoin investment if we can hold for a very long time.