How do we stake these coins? Have coins in my wallet but no staking is occurring. Any Guide?
No guide needed.
If you have coins on wallet,just unlock it for staking only (from wallet menu).
After some time (aproxx 8 hrs) your coins will be matured to stake and wallet begin staking,after another 1-2 days your income will be stable.

Thanks. Could you also please advise. I have send 500 crave to the address i've created for MN but 10hrs later don't have any confirmations. How long does it take to get confirmed?