Hi Nikos,
You seem to be missing a vital step - committing.
After files are added to a commit you need to “finalize it”, so to speak, by saying
git commit -m “commit message”
After that you can push.
Please do not compare apples to oranges. The whole point of using gerrit is to have a streamlined patch review process in place.
With a little bit of patience you can learn the way git works and after that you will see it is just as easy as cvs, but you do need to learn it!
I would be happy to find some introductory manual about git usage to help getting you on track.
Cheers,
Domi