I've been around with crypto for quite some time but never tried POW or POS mining. I'm aware that there are some mining calculators, which will allow you to count your profits on a specific setup, but is that a thing with POS mining?

Are there any specifics I should know about or is it limited to transferring coins to your Windows or whatever wallet and then keeping it online as much as possible?

The only coin I've tried to mine so far is CNX. They promise 12% annual returns, though I have no way of knowing is that profitable or not, at least it's working and I've already received some mining rewards.

I will be really grateful if you can provide some links to good materials about how POS mining works, or about this topic in general. What are your top 3 coins for POS mining?