Editing 4K Videos in 1080 to export in 4K?

I started a podcast and we film in 4K. When I try to Multicam edit in 4K, maybe because of my old ass MacBook, it just ran slower. After trying a million things (deleting everything google) I just tried Multicam editing in 1080 and it was perfect.

SO can I just edit the 4k footage on a 1080 project so it's quicker and easier, then before exporting change the project to 4K and render it again? Or will having edited it in 1080 change the original footage used and mess it up when changing it back to 4k?