Beginner here. :) I am using the Function Repository to do this.
I placed the Theme in the C:\Program Files\Wolfram Research\Wolfram Alpha Notebook Edition\12.1\SystemFiles\FrontEnd\StyleSheets
I get the following error when issuing the command, ResourceFunction["DraculaTheme"]["Install"]
No Wolfram Language translation found.
Also,
FileExistsQ[
FileNameJoin[{$UserBaseDirectory, "SystemFiles", "FrontEnd", "StyleSheets", "DraculaTheme.nb"}]]
gives me False, even though it's in there.
This is my first day using notebook so I am totally unfamiliar with everything...haha...so I know I'm missing a step or several....but if I could get this stylesheet installed, having a dark mode or theme would make learning notebook much more pleasurable.