You cannot mine ripple, as the owner can only make as many Ripples as they want but currently, the supply has 100,000,000,000 XRP. Now they will not make any more Ripple. Ripple gets destroyed every time any transaction takes place, so the amount of ripple decreases every time.

As it is a Centralized unit, it is made to help the banks and other financial institutions by their software. Normally you can purchase Ripple and keep it for your own use, but Ripple is not available on every Crypto platform. But there is a few online platform that allows you to mine Ripple, I dunno how?
By losing the value on every transaction, they are becoming more scarce.