[oldman]

If you get a plant growing indoors size isn't a problem, just cut it back to a manageable height and wait for new growth.

Getting it started indoors is sometimes tricky, but it helps to think about what the seed would need if it were growing wild. Most herbs take longer to start indoors than they do planted outdoors, or perhaps I just check about three times as often and it seems that way. If you have plenty of seed try sprouting some on a damp paper towel cut 2x2 or 4x4 square inside a baggie. Put it somewhere where it gets filtered sunlight for a few hours a day. Check it at least once a day to see if you have signs of life and to make sure the paper towel is damp. If you have a magnifying glass it might help the examination. Or if you take a picture with your phone that you can zoom in on it will let you see if there are changes. If you do notice changes fill a 2.25 or 4 inch square pot to within 1/4 inch of the top with damp, lightly compressed potting soil. Tamped down, not packed like brown sugar. Put the paper towel on the surface of the pot, seeds up. Sift a uniform layer of seed starter mix on top to just cover the seeds and towel. Mist until the seed starter is damp.

While you're trying the baggie trick you can also just directly sow seed in the corners of the pot your going to use for the baggie seed if it germinates. When you get seed to start remember that herbs, especially the ones that produce lots of seeds, are relatively delicate when getting started. (Lemon balm is an exception, it's easy to establish but hard to get rid of). You don't want to move the pot around much or do anything to disturb the plant until it's more than wisps of green. When watering just mist the soil, not the plant. You want to make sure the surface stays wet/damp. Keeping the whole pot wet isn't important because all the roots are still near the surface. And limited light is enough because plants growing outdoors would still be shaded by last year's dead vegetation at that stage.