So, want to do something with your hands? Here's a quick and dirty way to use a stencil to make iso-looking maps. Get some coins and trace them for quick circular rooms. Cut them out:
You can do other room types too. Stencil them onto your map:
Then shift it diagonally to a degree that looks good to you and stencil again:
Now erase the underground lines and shade the upper walls for your false perspective:
Not too shabby for a first try.