Download phantom or your wallet of choice from the app store or google play store for free. Desktop users, download the google chrome extension by going to phantom.app
Connect to Raydium. Go to app.Raydium.io in google chrome or on the browser inside your phantom app. Connect your wallet. Paste the $DAGGY token address into Raydium, select DogeMars, and confirm. When phantom prompts you for a wallet signature, sign.