Let me begin with your secondary question, about the correct category, first.
Choosing the right categories is very simple and anyone with open eyes and mind had discovered it by themselves, because it is written there:
Yes, every main category has a short description about its dedication, and additionally you will find a description-topic in every category, these are named after the following scheme: About the XYZ category, for instance, About the Development news category, which will help you to reduce the amount of maintenance work needed to keep this forum tidy.
As this screenshot proves:
Here as text-copy:
Develop
Your code is your artwork. Want to help Krita developers improve Krita. Post here to discuss the features and improvements. Gather feedback from fellow devs and the artists. Collecting use cases and feedback helps a lot in development.
And now to animation plugins. The only plugin, helpful for animation, that is known to me, is Project Pages plugin, but there may be more.
Other useful plugins? There are too many to name them, but what I always install, with every new Krita I set up, is Touchify and this replaces the KanvasBuddy and Krita UI-Redesign plugins, which I used to install before Touchify was available. Touchify also includes the Summon Docker, CoolBox 1.0, a Blender like toolbox for Krita, ToolKit 1.0.1, Compact Brush Toggler and Plugin - Reference Tabs Docker plugins, as well as the “krita-vaporjem-tweaks” from the creator of Touchify, so you can now call it a kind of Swiss army knife for Krita without exaggerating.
Here you find a meager description of it:
You will always find the most recent version when you click on the main button that is found on the far left side of the green code button on the plugins GitHub page , and after clicking the main button you have to select the highest version number before you can use the green code button to download the plugin.
This is the direct download link of the current version of Touchify:
https://github.com/CarWalTech/krita-touchify-plugin/archive/refs/heads/alpha.0.0.6.1.zip
Michelist