Going to give the most boring and answer here. Binance is probably the most popular and easiest exchange to use for newcomers. It is also one of the safest and most refined in my opinion.

However, everyone has different preferences. Be sure to take some factors into consideration before deciding which exchange is right for you.
https://cryptodefinitions.com/where-to-buy-cryptocurrencies-the-ultimate-shoppers-guide/

Sorry I am a bit late to the conversation.

As other have stated, an NFT or non-fungible token, is a token or a digital representation of a unique real-world asset. Stepping away from cryptocurrencies for a second, a $1 bill is fungible since it is interchangeable with other $1 bills. For example, if you lend your friend a $1 bill, he does not need to give you back the same $1 bill. In other words, all $1 bills are the same.

On the other hand, a car is non-fungible. If you lend you friend your car, he has to give you back the same car since cars are not interchangeable. NFTs works this way. therefore 1 NFT token cannot be traded for another since they represent unique things. This makes NFTs great for digital artwork, gaming items, and other collectibles.

If you want to learn more about NFTs I explain them a bit more here:
https://cryptodefinitions.com/dictionary/non-fungible-token-nft/

Count me in!