I liked the concept you have started out with here. You have set up the time frame nicely, by noting it is 20,000 years in the future, plus another 3,000 after one failed attempt. I like some of the nuances you added for the aliens, such as having to get a nod from their leader before speaking. You then alluded to the conflict when the humans gave the planet to the Vohm, instead of the Kausuins.
The only thing I can note that is a problem is some spelling errors and missing words. That all can be easily fixed by having someone else proof read your story.
I hope this helps. You did a great job! Keep it up!