I'd make sure you pH your soil and the water you're giving them. If the soil isn't between 6.2-6.8, they won't be able to absorb nutrients fully, and your plants and thus their yield will be significantly lower. If it's off, the cheapest and easiest solution is just to add baking soda to raise the pH and vinegar to lower it. That's one of the most important fundamentals you can do just to make sure your plants can get what they need from the soil in the first place. Also robbzilla gives good advice. You might want to pick up a basic plant nutrient to give your buddies some Nitrogen, Phosphorous and Potassium, which are the three biggies. Those would be my basic recommendations, but other than that, keep it simple. Nature knows what it's doing, so other than a helping hand your plants won't need much other than regular watering and space to do their thing. Best of luck with your first, keep us posted brother!