If you had the repository wouldn’t be empty when you or I browse to it on GitHub. It is possible that your push failed if there was a file larger than 100MB.
You have to add a Remote within GitKraken (left hand side of the navigation), it will ask you for a URL, add the URL you put above in that field. It will also want a name for it, I’d suggest calling it “origin” (fairly standard).
If you are not familiar with Git - BE CAREFUL - it is incredibly easy to mess this up and create yourself all sorts of problems - again - to reiterate - PRACTICE WITH A TEST PROJECT THAT YOU CAN AFFORD TO LOSE.
Once you have the remote added you can use the Push button at the top, this will try to push the files from your local repository to the remote one, the pop-up that appears will ask for the name of the branch, just leave it empty and it will name it “master” (again, fairly standard).
It will take some time to push all the files to your remote repository. To save yourself a lot of grief I would recommend checking that you don’t have any files of 100MB or large in your project directory.
If you haven’t already, you would want to add a .gitignore file also, this would automatically then ignore files of certain types/folder structures etc (the library directory as an example and any of the .vs directories) - this will help reduce the amount of clutter that doesn’t need to be in the repository and also make your push faster.
AGAIN - if it is easier, just use Google Drive for one last go but I can’t keep doing it that way as it is consuming too much of my time. Happy to run through that way one more time, I would prefer you didn’t rush the learning of Git and potentially lose anything you’ve worked on - hence all the BOLD in the above.