We'll create fresh WordPress site with WP Post Series installed. You have 20 minutes to test the plugin after that site we'll be deleted.
WP Post Series is a lightweight plugin for making a series of posts and showing information about the series on the post page.
Posts in a series will automatically show a series box (prepended before the post content), or you can insert them manually using the Post Series Block.
You can contribute code and localizations to this plugin via GitHub: https://github.com/mikejolley/wp-post-series
Use the WordPress.org forums for community support – I cannot offer support directly for free. If you spot a bug, you can of course log it on Github instead where I can act upon it more efficiently.
If you want help with a customisation, hire a developer!