Loading to Google Photos directly from iCloud

What is "because of lugging"? If you wish to transfer the photos from iCloud to Google Photos, you'll have to so from a computer: download the photos from iCloud Photos to the computer, then upload to Google Photos. thereafter.

You can't directly upload photos from iCloud.com to google.com , rather set up iCloud photo library and its preferences https://support.apple.com/en-in/HT204264

https://support.apple.com/en-in/guide/photos/pht5156cc968/4.0/mac/10.14

Select few photos from Mac system photo library folder https://support.apple.com/en-in/guide/photos/pht40b0be510/3.0/mac/10.13 and export to download folder in finder of Mac https://support.apple.com/en-in/guide/photos/pht6e157c5f/mac

Open google photos from the same Mac and sign in with your web gmail address and password , go to finder > location will be download select those photos and upload them https://support.google.com/photos/answer/6193313?co=GENIE.Platform%3DDesktop&hl=en&oco=0