Download MetaMask (a crypto wallet in the form of a browser extension) and TrustWallet (an app for your phone). After that you will have to add Solana to your network-list.
Buy Solana on an exchange (i.e. Binance, Kraken, Coinbase etc.). Transfer the tokens to your MetaMask wallet address.
Head on over to Radium and use the Contract Address to find the Token. View and HODL 🔥.