You did the same thing I did, and mine works fine. Do you see nano and the rnano symlink in the /home/username/bin directory?
If so, it should be working. Remember that unless you have modified your environment’s PATH, you need to run that newer nano with the command,
(if you are in your /home/username directory) and
(if you are in your /home/username/bin directory), etc.
Or, of course, from anywhere in your directory tree you can just use:
If you just type “nano” at the command line, even if you are in the /home/username directory, the “default” nano (mine is version 1.2.4) is what will run!