Hi, I was wondering if I might lose the mods I have currently installed when this new Steam Workshop thing comes out with the Creation Kit?
I have Quality Roads mod and Dovahkiin's Hideout mod instaled at the moment, and all my items and loot are in the Dovahkiin's Hideout and am afraid that I will lose it all.
Does anyone have any idea if the Steam Workshop will affect mods that have been installed before its release or not via Steam Workshop?
Thanks.

Probably not.

No you should not lose any mods. Using steam workshop is optional.

You shouldn't, but always keep a back up saved somewhere just in case.