In order to perform transactions on the Solana network with your brand new Phantom wallet, you will need some SOL to pay for transactions.
Solana (SOL) is available on a number of exchanges including Coinbase, FTX, and Binance. Once you have created an account, you will need sign in and find the Solana (SOL) market. In this example we look at coinbase.com.
To buy Solana (SOL), click the blue “Buy/Sell” button on the top right.
Then click “Buy SOL” and enter the amount you wish to purchase and at what price. On FTX, you can find these features on the top right of the webpage.