Height of the summer is a miserable time for mail ordering plants due to heat and damage to green growth, best to wait till late autumn. As for seeds, just remember that fig seeds will not generally produce the parent. In fact (due to a very complicated gendering among figs), you may wind up with male plants that do not produce edible figs (called caprifigs) or smyrna types which are female plants that require pollination. Fig pollination only occurs via a certain wasp that only lives in a few places in the world, so buying or rooting your own plants grown from cuttings is the only way to ensure you get a viable plant. Most of the figs traded in the U.S. and Europe are self-pollinating types (Celeste, Brown Turkey, Negronne, Italian Honey, etc.) so cuttings (or buying an established plant) is the way to go. If you are seeking common figs like Brunswick or Celeste, I would find a local nursery or grower and buy a potted plant. You'll get a year or two headstart on eating figs - and for trees like Celeste, finding a mother plant in your local area that is a great tree will help ensure you've chosen a strain that does well in you area. Save cuttings for rarer types or just get cuttings from neighbors to practice on so you'll have great success in the future.
Happy figging!