There's plenty of tutorials but you can request a Google Takeout of your photos and then point immich-go at it. I can confirm that this works really well.
replyhttps://takeout.google.com/?pli=1 https://github.com/simulot/immich-go
The problem with google takeout is that it generates hundred of files to download as ZIP. I tried it in my own collection (800GB).
replyAgree - it's annoying. rclone to the rescue. Requires choosing Google Drive as the destination and then downloading with rclone to your computer. It's the closest to sane I've found.
replyhttps://metadatafixer.com/learn/how-to-download-google-takeo...