First i would suggest going with greens that are fast-growing for a start such as radishes, mustard, broccoli, sunflower and pea shoots. They all grow within a range of one to two weeks. You can find seeds for them at a local shop or online at amazon or etsy. For start you'll need the seeds, shallow tray, growing medium, spray bottle and if the sun is limited led grow light. First you soak them and then you prepare the tray with one to one and a half inches of medium, then you sprinkle the seeds, press them lightly and add another tray on top just to simulate soil pressure. After a few days when they have sprouted remove the tray on top and place them under light. Water them twice a day. Good luck