Checklist in the Confluence space

I would like to create a checklist on the left in my Confluence space. Clicking on any of the checklist item would ideally open the page associated with it on the right. It may be like a dynamic checklist but I am unable to find anything that would help me to do that. I am new to Confluence so apologies for a simple question.
Please find attached 2 pictures just to make it clear what I would ideally like to do.

Thank you.

To make it clearer:
Ideally when I click on second page - The second page information should show on the right and the checklist must remain open on the left.