How to buy NFT on tensor?

So, I'm curious about purchasing NFTs on Tensor. Can you walk me through the process? What are the first steps I should take to get started? Do I need to set up a special wallet or account? And how do I ensure that my transactions are secure? I'm also interested in understanding the fees associated with buying NFTs on Tensor. Is there a standard fee structure, or does it vary depending on the NFT I'm purchasing? Lastly, can you provide some tips for newbies like me who are just starting out in the world of NFTs and crypto? Thanks in advance for your help!