start simple. It is all right to just make extremely simple meals while you get in to the habit of cooking on the regular schedule. sit down on Sunday evening and scan the internet for ideas what to cook that week, make a plan, and buy groceries on, say, monday.
It is all right if the plan doesn't go perfectly, something is better than nothing. Most of it is just practice.
I'm Icelandic. The water is potable straight from the tap: no filtration or boiling required, albeit the hot water may smell a bit of sulfur due to being heated with geothermal energy.