First of all, thank you very much for your help. Secondly, I am mining, and I've asked myself this question. I’m not sure if there is a trick to it, so I’m reaching out to see if you have any insights.
Is it because there are restrictions in your country? is crypto banned there, and you're mining even with that rule? There is no trick in buying Bitcoins, and the suggestions are right on how someone can buy it. Even if you're from another country, there could be a local exchange there that you can rely on. But if not, there goes the usual exchanges where people buy it and those are the centralized exchanges where you have to pass your ID for verification and KYC process before you start buying Bitcoin.
depend on what country you are, but you can also buy with BTC with Cash from Bitcoin ATM
you can search on google Bitcoin ATM in London
otherwise if you want to buy online I would suggest to use Binance
While it's a good way to adopt using Bitcoin ATMs, OP or anyone interested on it might not like how much fees they possess.