Gonna get a Quest 2 with my stimmy check, since my Rift shit the bed, got a few questions

>do I need to buy the Oculus Link Cable, or can I buy any USB-C to USB-C cable?
>my PC doesn't have USB-C ports but my graphics card (RTX 2080) does; can I plug it into that?
>will USB-C deliver power to my Oculus Quest, or do I need to be mindful of its battery life when plugged into my PC?