Hi fran! Unfortunately the only homes or commercial lots I put up on the Gallery are CC free. I don't like to share lots with CC as the description box doesn't allow that much room for me to list all the creators. I don't like to just put "contains cc" and not give credit to the creator individually.
When downloading from here, all you have to do is unzip the file (I download to my downloads folder then unzip everything inside to my desktop) then go into your documents folder > electronic arts folder> the sims 4> tray. Open your tray folder then copy and paste everything that came out of the file you just unzipped. When you go in game, go to your library and it should be there. You may have to go into the menu thing and click on show unowned custom content for it to show up. The cc I used in my game will not come with the home so if you want any of it you'll have to go to the link I provided and download it.
Just so I didn't make it frustrating, follow these easy steps:
3)open tray folder inside the sims 4 file
4)copy and paste everything unzipped
5)close file, open game, go into your library and download onto lot you wish to put it on