Question about updates

So basically, in my group home there is shared WiFi meaning it blocks certain websites (basmental, wonderful whims etc) so I have to wait until I go over my sisters to update the game and mods. I’m at my house now and I have an idea for a build which will require me to download some new build cc.

Just wondering am I able to add some cc before updating the game and going back on online mode or does it not work like that? Thanks