In the Ranking, you can filter by 24 hours, 7 days, and 30 days. This is a great way to see what is popular right now.
The Floor Price is the baseline price for an NFT in the collection. Many of the Top NFTs are very expensive ranging from 1–8 ETH.
When you view the collection, you can see if they are verified by OpenSea with a blue check.
You will have to connect a wallet like Coinbase wallet or MetaMask. I have used both options and they are very similar.
Keep $150 or more ready for the Ethereum Gas Fee
DO NOT share your wallet key with anyone! Be careful about people that will try to help you in Discord as they might be a scammer.