Where can I buy Rwa?

Excuse me, I'm new to the world of cryptocurrency and I'm interested in purchasing Rwa tokens. Could you please tell me where I can find a reputable exchange or platform that offers Rwa for purchase? Are there any specific steps or precautions I should take when buying Rwa to ensure the transaction is secure and legitimate? Additionally, is there a minimum amount required for purchasing Rwa, and what are the fees associated with the transaction? Thank you for your help.