Skyrim version can be downloaded here.
Skyrim doesn’t have the same omnidirectional camera movement that the Souls games have -- if you have your weapon drawn and you turn your camera, your character turns in that direction too. This makes a lock-on system less of a necessity, but like tumbling, the lock-on system is a pretty big part of Souls combat.
As far as customization goes, this mod is pretty straightforward, but if you find that the default lock-on texture isn’t to your liking, there’s a Dark Souls-themed texture replacer you can check out.
Unfortunately, there is no version of this mod currently available for Skyrim Special Edition. However, the Simple Face to Face Conversion mod has a Simple Lock-On Alpha listed under miscellaneous files that you might want to give a try.