Sabrina - I would omit the compost and lime in the above mix. You can plant your seed at any time. I use a pencil to poke a hole down into the potting mix about 1 inch. It should not be a deep hole.
Everyone here sows and germinates seeds differently. Rather than write everything I do, read the article I wrote about growing daylilies from seeds:
http://garden.org/ideas/view/b...
I've personally had very good luck with my method, but there are many other ways to grow seeds as well. The trick with seeds is not to let the soil stay too moist. It can cause a fungus that will kill the seedling, which is why I add a couple of drops of hydrogen peroxide to any water I use to water the seedling with. I also don't water but once a week unless the soil dries out faster.
