I would not recommend playing them this patch, as they are fairly weak currently. This patch, I would recommend learning how to jungle using easier ranged junglers. Next patch, however, they are getting a miniature rework that will make them significantly stronger. I would recommend waiting to learn them until that comes out, as if you learn them before, you will basically have to relearn them.
The mini rework moves her % health damage on her passive from her autos to her abilities and instead has her passive grant her autos bonus range. The range boost is that, after obtaining 4 stacks, Kindred gains +75 range on her basic attacks, as well as on the cast range on her E and the arrow targeting range on her Q. Every subsequent group of 4 stacks gives them all an additional +25 range. Her W now deals % current health damage, while her E now deals % missing health damage, and both deal it in magic damage that still scales with AD. The E also crits if it hits an enemy below a health threshold, equal to 15 (at max rank) + 50% crit chance % of their maximum health (so it will deal the bonus damage if they are below 45% of their max health if Kindred has 60% crit chance).
As far as builds go, I would still recommend the same build path for her next patch as this one:
start, then
and pretty much just a general ADC build, but with Bloodrazor if you're jungling.