Barring finding distilled at the grocery store or the auto parts store, I have distilled water at home before quite easily.
I have a 4 gallon pressure cooker pot that has a removable weight on the lid.
On that weight post I crimped the end of a copper coil I'd made of 1/2" copper tubing carefully bent to a coil around a piece of 4" PVC pipe.
I set a two gallon jug on the floor to collect the distillate, and used a small house fan to cool the coil, otherwise too much steam is lost into the air. Make sure the fan isn't blowing on the stove top or the pot, that will slow down the process.