Q.Can you split elfin thyme
Also, can you grow the plant indoors? I make small gardens to grow indoors. Can you do that with Elfin thyme? I purchased the plant but the pot is too big, so can I split it up?

Elfin thyme is easy to divide and propagate, but I don't know about planting indoors. It requires full sun, and generally speaking full sun plants don't adapt well to indoor cultivation. However, that's no reason not to try. Half the fun of plants is experimenting, right? This article might have some information you can use: https://www.gardeningknowhow.com/edible/herbs/thyme/elfin-thyme-information.htm