Make lemon balm tea - recommended method
The flavors will be different; try both and see which you prefer. Personally, I love teas made from fresh herbs.
I'd start with, say, 6 fresh leaves in a mug of tea. Roll them and unroll them first to bruise the leaves and release essential oils. Depending on how you like that, adjust up or down next time.
It is in the mint family, it should make a tea somewhat similar in character to mint tea. You should just try it alone first and see. If you decide it needs something else, any of the herbs that go with mint will make sense here too.