Where can I get stETH?

Excuse me, I'm trying to get my hands on some stETH, but I'm having trouble finding a reliable source. Could you possibly point me in the right direction? I've heard about exchanges and decentralized platforms, but I'm not sure which one is the best option for me. Is there a particular exchange that you recommend for buying stETH? Or should I consider using a decentralized platform instead? Also, are there any specific things I should look out for when purchasing stETH to ensure that I'm getting a good deal and avoiding any potential risks? Thank you for your help!