POS coins can be staked on pretty much any computer. Even a Raspberry Pi for example.
There is no need for any special hardware, and they use very little energy compared to POW.
You just need to buy a sufficient amount of coins to stake, then store them in your password protected wallet, which will be unlocked for staking only. And you're good to go!
Thanks.
what would be the next step after storing the coins in a wallet? That's the part I'm trying to figure out.