Kraken is a reputable exchange with strong security and regulatory compliance in the US. But as per my check Melania is not available or not yet listed on their platform. Also why did you choose memecoins? These often end up as rug pulls. Since you're new to crypto take your time exploring the platform and please enable two-factor authentication for extra security. If you ever decide to dive into on-chain trading later make sure to double-check contract addresses on sites like CoinGecko or CoinMarketCap to avoid fakes. Best of luck with your crypto journey!