How to purchase Decentraland?

For those looking to delve into the fascinating world of Decentraland, the process of purchasing a plot may seem daunting at first. However, it's actually quite straightforward once you understand the steps. Could you elaborate on the initial steps one should take to purchase land in Decentraland? Specifically, what are the requirements for setting up a wallet and obtaining the necessary cryptocurrency? Additionally, how does one navigate the marketplace to find and acquire a desired plot? Finally, are there any common pitfalls or mistakes that potential buyers should avoid during this process?