Structure when entering/exiting a dimension

I'm trying to make an aspect of my mod so when you right click a block it will bring to you to a certain dimension and then summon a structure around you, then when your in the custom dimension and you are in the structure click another custom block that was in the structure and have it so it brings you back to the dimension at the place you were. I have no idea how to do this however so any sort of help will be grateful and I'm pretty sure this hasn't been talked about before because I have looked everywhere for an answer, thanks.