Step 1: Connect to https://opensea.io, select your wallet type, if your wallet is Metamask or Coinbase Wallet, you can select WalletConnect to see whether your wallet is support by opensea or not.

Step 2: We use Metamask as the most common example, it will pop up a dialogue, please click "sign(簽署)" button

Step 3: If this is the first time you visit opensea, it will ask you to update your profile settings, I would suggest you to fill these before you continue, in some case if you did not complete these setting you may encounter some unknown issues.

Step 4: If your wallet already contains some NFT, it would be appeared in opensea as below: