Where can I buy THETA?

I'm curious, where exactly can I purchase THETA? I've been hearing a lot about it lately and am interested in adding it to my portfolio. Is there a specific platform or exchange that you would recommend? Are there any safety measures I should take into account when making this purchase? I'd like to ensure that my transaction is secure and that I'm getting the best deal possible. Do you have any advice on how to approach this purchase? I'm still relatively new to the cryptocurrency world and would appreciate any guidance you can offer.