Home commands include both the placing of your home and teleporting home, /makehome costs diamonds to place, while /gohome will have a cooldown.
/makehome will ask you to type in /makehome confirm to place your home that you can teleport back to after a set time (check /gohome). The placing of your home will cost 3 diamonds.
/gohome will instantly teleport you to the location of wherever you set your home at, with the command /makehome. It has a cooldown of 500 seconds.