Download your favourite ethereum wallet: metamask.io or frame.sh or enkrypt.com or another one (depends on what you like: closed/open sources, IP logs or not, UX/UI design, etc). Follow the instructions in the official wallet website to create your wallet and keep your credentials safe. Remember, nut your keys, nut your coins.
Either you're a lucky guy and already have ETH in your wallet, either you need to buy ETH from your favourite (de)centralized exchange. For more info, check ethereum.org/en/get-eth/. Then, transfer ETH to your wallet.
Go to app.uniswap.org & connect your wallet. Paste the $NUT token address into Uniswap, select Nutcoin and confirm. When the wallet popup shows up for a wallet signature, sign.
Swap ETH for $NUT. In addition to the current network/protocol fees, there are NO extra fees/taxes for the token contract owner because there is NO owner.
NUT checklist - use: cute animal pictures, a trillion token supply at least, a logo created in less than 10 minutes, a supply capped by the holy number '21', etc.