No green thumb? This project is all you. The air plants used don't even need soil!
Hence, you can hang it upside down, sideways, inside out, whatever. OK, maybe not inside out. They need to be watered 1-2 times a week (you can spray the roots with a little spray bottle) and they need indirect but relatively bright sunlight.
You'll need to find small planters with about a 3 inch opening, and drill a hole in the bottom with a diamond bit so you can put a rope through.
See the full tutorial on the dirty loft blog: www.thedirtyloft.com