1. What is the procedure for purchasing and selling Bitcoin, and are there any crucial elements to take into account before beginning?
The process for exchanging bitcoin is via exchanges. I recommend the most popular from this list:
https://kycnot.me/. They're exchanges which don't require you to give Know Your Customer data, like phone number, selfie, home address etc. The crucial elements to take into account before beginning are:
- Understand how bitcoin works in a fundamental level.
- Understand how these exchanges work. (the transaction process, costs etc.)
2. I'd appreciate an explanation of how Bitcoin mining functions and how it maintains the security and reliability of the Bitcoin network.
Here's your answer:
https://learnmeabitcoin.com/technical/mining3. Why is using Bitcoin better than using conventional currencies?
It's not
objectively,
always better. As everything, it comes with tradeoffs. It's better in the sense that you know the transaction will finalize, no matter what, that the cost is pretty transparent (it isn't determined by a bank monopoly), that it can't be confiscated without your permission, that it's always accessible as long as you're Internet connected, and that it can't be devaluated by arbitrary inflation.