To better understand what exactly BTC is better read the whitepaper. To summarise, btc is peer to peer electronics cash transfer protocol.
Miners are running to solve a complex program and who ever solves this complex program wins the chance to write to next available block and is given reward for his services.
I believe not just the white paper, which can be very technical, but also the basic information in these links.
https://en.bitcoin.it/wiki/Main_Page
https://developer.bitcoin.org/
https://bitcoin.stackexchange.com/
OP, your questions will be answered if you go through some learning, and gain some basic understanding of Bitcoin from those websites. Once learned, I believe then you will “get it”.
Great resources, I'd like to chime in and add https://github.com/bitcoinbook/bitcoinbook!
OP, another link with MORE learning resources, https://bitcoin-only.com/learning-resources
Read them. It’s truly my belief that people who have access to the internet have no more excuse not to learn any topic that interests their intelligence.