What is not working? We need some more information.
Also on the plex docker, you should have /tv to /mnt/user/TvShows/ instead of /media, and /movies for /mnt/user/Movies instead of /media. Now you have /media two places on the same docker.
I have made those changes and plex is working!! Thank you. What about sonarr? Can you see any errors? I can´t even go to the webui. It wont load.