So how exactly does forging work? Does it take up cpu or browser power? I just started forging to see how it goes.
No, forging is proof of stake, so you just prove that you own the private key and then you can join the lottery of forging blocks. This uses nearly no cpu power at all, just let your wallet forging. But with 30000 NAS you will not have a high chance at forging a block
Imagine a lottery with 5 billion numbers and you can only pick 30000 of them. That's your chance of winning each 1 minute block.