Look up you Hardiness Zone and get a vegetable planting schedule! Zone 7 Vegetable planting calendar describing approximate dates to start vegetable plants indoors and outdoors relative to specific USDA P.
Succulents and cactus plants need fast draining soil in order to survive and grow their best. It's easy to make your own succulent potting soil, and cheaper than buying the commercial stuff. Here's my recipe and detailed instructions for DIY succulent pot