Unfortunately, I don't know an easy way.

My path was like this:
- Learn how skeletal animation works in general.
- Learn Blender, and learn how to import models and animations from Mixamo.
- Learn Python, and learn how to write Python scripts in Blender.
- Write a script that exports these model and animation to my own format.
- In the game itself, you need to write functions for loading this format, for converting to format understandable GPU ...

If you're a beginner, all of this can take over a year. I think my answer will not help you much.