This guide will let you know how to get Kuva in Warframe. You have to follow all the instructions carefully to get it.
There are several ways to get Kuva, some being more difficult than others. The first way you can get it is by running the Daily Sortie, as it can drop as a reward for completing it. You can also buy it from the vendor at an iron wake or an arbitration vendor who can be found on any relay station.
Another way you can get kuva is by destroying kuva siphons found in kuva siphons missions.
To get kuva from these missions, you have to destroy the sihon found in the mission. You can destroy the kuva clouds using your operator mode as they appear and go towards the kuva siphon. Once all the braids have been destroyed, the siphon will destroy, and you will be rewarded with kuva.
You can tell which direction the Kuva cloud you need to destroy is comming from because a braid on the kuva siphon will raise up and point in the direction that the cloud is coming from.
The last way you can get Kuva is by running the disruption mission on the kuva fortress as a reward for each round is kuva, so you can more or less farm it from this mission alone.