You'd just need to switch the arguments (which represent source and destination) like rsync -av ./newfolder [email protected]:/home/my_folder.
rsync -av ./newfolder [email protected]:/home/my_folder
Have a look at man rsync which explains that a trailing slash after newfolder would only transfer the contentscontents of said directory- -in in this case, you'dyou might want to change the upload destination to .../my_folder/newfolder.