Wallet Setup

To become a validator, you'll need the menomic generated while installing and running the node.
Once you have that, set up your wallet to become a validator.

Setting the Wallet

Install the polkadot.js extension

You can get the polkadot.js browser extension from here:

Import the key

First, open the extension.
Then, press the
button in the menu:
Press on "Import accounts from pre-existing keys":
Follow the dialog to import the key.
In the end, you should see the address corresponding to your validator key. Use this address when claiming the tokens you have purchased during the public offering or if you are selected for the airdrop (Read the criteria here).