Hi there.
Insofar as manifesting/affirmation cards, this is why it's suggested you phrase things positively (what you
do what instead of what you don't), and why it's a good thing to go back and review what you've written regularly. If you see something manifesting that you no longer want, simply change the intention!
For very small living spaces (studio apartments, etc.), I've heard it suggested that sometimes it's easier to divide the whole place into the 9 directions, instead of trying to sort out bedroom from kitchen if there's only a few feet between them.
Start small, make only as many changes as you feel good making, enjoy and
play with the process. I worried about 'bad energy' myself, but look at it this way: you've got this information, now, and you're working with it, so you can only improve as you learn more! Best of luck & hope this helps you some. ^^