I'm uploading full wedding galleries to lightroom and instead of going to the cloud it is taking up all my mac storage. I need to have multiple wedding galleries in there at once to edit during wedding season. I'm not sure how to keep it in the cloud.
Please give more information. Are you using Lightroom or Lightroom Classic? You posted this in the Lightroom Classic forum. Lightroom Classic does not store its images in the cloud, but locally.
Lightroom Classic stores your original images locally, there is no way around that. It does not have to be your internal drive, however. So if you do not have enough room on your internal drive, then get an external one and select that as destination for your images in the import dialog.
As you sound a bit confused on where LrC accesses the original photos, I think a couple of points need to be stated:
As for some more on point info, a few links: