How much does it cost to start playing Splinterlands?

If I'm interested in diving into the world of Splinterlands, what would be the initial investment required to get started? Is there a minimum amount of cryptocurrency or fiat currency that I need to have on hand to purchase the necessary in-game assets or tokens? Are there any additional costs or fees that I should be aware of when starting out, such as transaction fees or platform fees? Additionally, are there any promotions or discounts available for new players to help offset the initial costs?