I'm writing specifically for those who still feel skeptical investing in Bitcoin, most especially the newbies and Jr members like myself.
Bitcoin was created to solve a couple of big cryptocurrency flaws. First, it was designed to prevent crypto coins from being fraudulently duplicated. Think about how easy it is to make copies of your computer’s data—documents, photos, files, etc.
I disagree with you on this, bitcoin was created by Satoshi Nakomoto for individuals to take financial control from traditional banks and to be their own bank after the financial crises in 2018, in the traditional banking system. Read bitcoin white paper for more information.
I see that you don't have any bitcoin and that is why you don't know the steps of buying bitcoin from an exchange. You should know that it is not compulsory to buy bitcoin from CEX but you can buy from someone you know and also from DEX using p2p. Newbies should read more, instead of teaching.