Yeah, it's a sad thing that I've just blown ~£3k on a new PC (first none work one in years) and Skyrim will probably be the first game I play on it
Try the above mod (s) in the youtube link, its one of the most extreme ones i have tried. The biggest problem is the need for a 1TB SSD to be able to stream the world with its 8k and 4k textures. Im not playing at 8k (dont have an 8k tv) but 4k, way above 60fps. Its a old game in its roots (and it shows in some places and characters), but with all those mods, dynamic volumitric lighting and ray tracing this one still holds up. And, its all free if you bought the game many moons ago.
Skyrim Special Edition Nexus - Mods and Community