You have several options.

Option 1: Coinbase

1. Sign in to Coinbase.
2. Select Buy / Sell on the upper right-hand side.
3. Click the Buy field to select the asset you'd like to purchase.
4. Enter the amount you'd like to buy denominated in crypto or your local currency.
5. Select your payment method.
6. Click Preview Buy to confirm your purchase (you can always click the back arrow to make a change).
7. If the details are correct, click Buy to complete your purchase.

Option 2: Cashapp

See video https://www.youtube.com/watch?v=qLwQPvxNVnU