Please recommend ways to start studying Korean and free resources!

Hello, I have a question for those interested in studying Korean. I'm trying to start learning Korean for the first time, and I'm feeling a bit lost about where to begin. In particular, I want to focus on basic grammar and everyday conversation. Recently, I discovered a beginner-level Korean course material on Substack. The grammar explanations are simple and easy to understand. It covers everything from the basics of Hangul to everyday conversations, which I found great. There are also short practice problems at the end of each unit, making it easy to review. Are there any other free Korean learning materials or recommended methods? Specifically, if there are any learning resources or communities near Gangnam or Hongdae that are easily accessible for foreigners, please let me know. Thank you!