If you really want a fresh experience and don’t wanna spend more time modding than actually playing, I cannot recommend more strongly Wabbajack. It’s a fully automated modlist installer with a huge gallery of available lists.
Some of the available modlists are foundational, giving you just the essentials (Engine tweaks, HD assets, community bug fixes, etc.), and some are total conversions, turning the game into a fully-realized modern third-person action game, with controls, animations, and graphics as good as any modern game.
It does everything for you, from installing Mod Organizer 2 to creating game launch shortcuts, and everything in between. All you have to do is log into Nexus (and whatever other mod sites your modlist of choice might use). It’s worth getting Nexus Premium at least temporarily to speed up the process.
Here is the Skyrim Special Edition modlist gallery.