You’re very welcome! Yeah, you can use Shared Compendiums for a lot of that stuff! Have a look at the doc explaining them over here for help getting them set up 
World compendiums generally won’t affect loading times like having loads of actors and items, but the other benefit of putting the D&D Beyond imported data in a shared compendium is that you can easily move it between worlds!
Best of luck, and let us know if you have any other questions!