Hi@akhtar,
As mentioned, there are no such prerequisite skills required to start with Jenkins. It depends totally on one's determination and hard work to grab the knowledge and concepts. For a beginner, I suggest to take an DevOps course as it will guide you with right knowledge and help to understand all basic to advance level concepts of AWS with some use cases.
Here, I have attached the link of Jenkins resource.You can go through it.
https://www.youtube.com/watch?v=p7-U1_E_j3w
https://www.edureka.co/blog/jenkins-tutorial/
Hope this is helpful.