As a prerequisite, you need an OpenSea account that is activated for selling on Polygon, and a few cents in Matic on Polygon for the transaction fees.

It’s is very easy:

1. Log in on your Universal Profile page with MetaMask

2. Transfer the desired NFT into your MetaMask wallet

3. GoTo OpenSea and sell the FANZONE NFT

What is the easiest way to accomplish the prerequisites?

The best is to log in to OpenSea and start the purchase of any affordable NFT on Polygon. Once you start the purchase process, OpenSea will guide you through the necessary steps.