First, use Vortex Mod Manager – it makes installing Hogwarts Legacy mods a lot easier. Check the mod’s page and see if it mentions being dependent on any other mods.

How to install mods for Skyrim Special Edition In this guide, we'll be using Vortex (previously called Nexus Mod Manager), which is universally recommended to keep things organized and to make ...

It’s safe to use and among the most popular mod sites for games, especially Bethesda-made titles. Download and install Vortex. Vortex is a mod manager developed by Nexus Mods.

Vortex can be downloaded here, and then you can grab the Bannerlord support extension. Instructions on how to install them can be found on their respective pages.