I'm newbie, just stumble upon this coin.
And I have a question, how do I get 10% from POS? Should I put these coins in full node client and just wait for it to start stacking? Is it correct?
Yes, you are basically correct.
However, there are two points which I should mention.
1) Stacking starts only after 24 hours.
2) You should periodically bring the wallet online, at least once a month, let it fully sync and wait for a mining rewards. It's important because this coin has a maximum stacked age of 30 days.