If you are new to hydroponics and the Kratky Method, then you have come to the right place. The Kratky Method is a passive growing method. I like to call it the lazy person method. The Kratky method is also a low-cost method, and you can probably find all the materials you need to start growing with the Kratky right in your home.  The only cost involved with the Kratky Method is the seeds, the growing medium, and the nutrients. I would start with something simple to grow, like lettuce. Once you have and gained the knowledge and experience, move on to something more significant like flowering plants.