you may be interested in this explanation on how Confluence and JIRA can be integrated: https://www.youtube.com/watch?v=bK3m1jrMLro
Demo: Integration of JIRA, Stash, and Bamboo for Git Development Teams
We do offer a full stack deployment of all of these products with our service Codeyard.
You can generate an instance here: https://www.codeyard.com/en/test-now/
This Codeyard instance will be for free and will have a couple of use cases prepared in the instance already. We focus on the integration of multiple products here.
If you have any further questions, please let us know.