Hi misty - have you reviewed all the FAQ's here? Linked at the top of the front page. They cover most of the basic info needed.

As to when to transplant? It depends on how crowded it is in your starting containers. If crowded, transplant some now with lots of care. Handle the leaves only not the stems. Are the stems on anything real long and leggy? If so they need to be transplanted deeply to just below the bottom leaves now.

The rest can wait until they develop their first true leaves. Then transplant them to new containers and either use a mix with fertilizer already in it or start feeding them a mild 1/4 strength solution of any good liquid balanced fertilizer.

Enjoy your plants.;)

dave