They look fine, wait a week more two before starting a feeding program. BUT I would suggest just getting some high quality organic soil from Walmart parking lot or lowes type store and adding a bag or vermicastings and 25% perlite or biochar. Organics is much tastier and easier to control. Don't get a miracle grow organic bag though. Look for something saying hummus rich, vermicastings, compost rich. That sort of shit. You can add a bag of mushroom compost if you want. The vermicastings contain a huge network of microbial life and they enjoy the hummus. The real way plants thrive is a complex network of mycorrhizae, bacteria, and the roots. Miracle will grow plants but through a system toxic to soil life, a you end up always needing the miracle grow.