Assuming you already have an account on Coinbase, here are the steps to follow in order to transfer your AVAX from Coinbase to MetaMask.
1. On Coinbase, go to the “Buy/Sell” page and search for “AVAX”.
2. Select “AVAX” from the list of options and enter the amount you wish to purchase.
3. Click “Buy Now” and confirm the transaction.
4. Once the transaction is complete, go to the “Accounts” page on Coinbase and select your AVAX wallet.
5. Click on the “Withdraw” button and enter your MetaMask wallet address in the “Recipient Address” field.
6. Enter the amount you wish to withdraw and click “Withdraw”.
7. Confirm the transaction and wait for it to be processed by Coinbase. Once it’s complete, you should see your AVAX balance in your MetaMask wallet!.