Sean the rules of the raffles are explained there in.
In regards to acorn that is the currency we use to buy tickets for the raffle. There are many ways that you can get acorns. The easiest ( which should work in your favor) is to post pictures of plants, trees, bulbs and the like with it's proper name to the database. Other ways are fellow gardeners liking your comments or pictures and gifting you an acorn or more. You can also win acorn prizes in the raffle as well. Looking forward to you sharing pictures from where you work. It should be exciting.