Where can I buy xDai?

I'm curious about purchasing xDai, but I'm not entirely sure where to start. Could you please guide me through the process of buying this cryptocurrency? I've heard it's a popular choice in the decentralized finance community, but I'm still a bit of a newcomer to this realm. I'd appreciate any insights you have on the best exchanges or platforms to acquire xDai, as well as any important considerations I should be aware of before making the purchase. Additionally, I'm wondering if there are any specific steps I should take to ensure the security of my transaction and my wallet. Thank you for your assistance in navigating this process.