Yes the whitepaper explains in detail, if you want a quick article type read you can read

details about are public / private tx system
https://medium.com/x-cash/x-cash-major-update-1-4-0-flexprivacy-cnv2-bulletproof-and-fixed-ring-size-106a20ce0b06
private tx are identical to other cryptonight coins (were using a ring size of 21 higher than most other cryptonight coins)
public tx example https://explorer.x-cash.org/Transaction?data=7ecd79d7ead6c2f23cb404409aca01f8c9e30d7b07bcd4e9332a1c4872d1dd93
(does not show full balance of sender, and still implements ringct)

x-cash proof of stake, not all the details are out yet since this system will be a mix of a few other systems, but will be unique in the implementation and settings we have changed to these systems.
We will have an article on the full details sometime towards the end of feb.
right now the whitepaper and AMA 2 is the best source of info. (1M is needed to participate in X-CASH proof of stake)
scroll down to the x-cash proof of stake part.
https://medium.com/x-cash/x-cash-discord-ama-2-d516d0daac5