Bitcoin mining is one way to get Bitcoin. As mentioned earlier, we can see Bitcoin as a large global cash system that holds a history of transactions or money movements

To know about Bitcoin Mining, Please read this one How Bitcoin Mining Works (https://www.coindesk.com/information/how-bitcoin-mining-works/)
for the second one, you can mine as much as you can with your hardware.

The proof, verify transactions. Miners collect fees for each transaction and also a block reward once they've done enough proof of transaction work. The latter is what creates new Bitcoin.

You should check out the mining board on this forum, there's a lot of helpful people on that site!

https://bitcointalk.org/index.php?board=14.0