ahlan ya Mehdi! The two languages are indeed quite beautiful. Yes, I think that's a good idea. In fact, you may learn Chinese (Mandarin) first then try learning Korean, it doesn't really matter. You'll see that the two languages share a lot in vocabulary due to Korean (like Japanese and Vietnamese) having over half of its vocabulary that consist Chinese characters but grammatically and structure-wise, they're quite different. When you consider the writing system, Korean is much easier than Chinese but Chinese grammar is a lot simpler and straightforward than that of Korean. Good luck to you!