Since you can now buy NFT's on LIVEPLEX - here is a NFT primer
These are the steps needed to buy an NFT:
1. Download Metamask, a Chrome extension that acts as your virtual wallet and an e-signature in one.
This interacts with platforms to allow you to buy and sell NFTs on the blockchain.
Make sure to (physically) write down your password, and keep it somewhere secure you won't forget!
2. Create a wallet on Metamask
3. Send ETH (Ethereum) to the wallet
Eth is the most common currency used for trading NFTs; although others like Sol (Solana) are gaining in popularity.
You can buy Eth with your credit card or bank transfer on Coinbase, Kraken, Binance or any other such app.