Монгол хэлээр бие даан солонгос хэл сурах хамгийн сайн арга юу вэ?

Hello! I am currently a beginner learning Korean. I am in the process of mastering the basics of Hangul, and while I can read to some extent, I still struggle with translating the meanings of unfamiliar words. Attending a language school is financially burdensome, so I am considering books or online courses. It's difficult to find Korean classes in my area. I am curious about the most effective ways to learn Korean through self-study. I use apps like Duolingo daily for review, but I have trouble finding reliable websites or other learning materials. Could you recommend any good methods or resources? I understand this may be a frequently asked question, but I would appreciate any help you can provide.