Open your internet browser and visit MetaMask.io - then download the extension.
Visit Uniswap.org and click "connect wallet".
Metamask will ask for your signature first, go ahead and sign it.
Connect to Uniswap
Buy ETH at any exchange and send those to your MetaMask wallet.
Set your slippage at 2 % and enter the amount of ETH you would like to swap for $ARCTICFOX.