I don't know if you can or if you can, i don't know how to change where you spawn on a plot in prison
Hello! You can, by running the command /p sethome. This will set the spawn point on your plot to wherever you're standing, and in whatever direction you're looking when you run the command. If someone does /p h (YourName) after that, they will will be teleported to the custom location that you set. Hope this helps, have a great day!