How did you overcome the language barrier while working in a Korean workplace?

I am a foreigner who has passed the Korean language proficiency test TOPIK level 6 and has been working at my current job for a month. In the first week, I was shocked by the fact that my Korean language skills were not at a native level. Especially when colleagues were speaking quickly in everyday conversations, and when unfamiliar work terms were used, I felt like I was missing a lot. I can relatively keep up in one-on-one conversations or meetings, but I often feel lost in the natural flow of conversations among colleagues. Have any of you experienced this situation? How did you overcome it? Fortunately, the work atmosphere is good. I work at a company in Gangnam, and my colleagues are understanding and always willing to clarify if there is something I don't understand. I can easily follow everyday conversations as well. I didn't expect to have a perfect native level as a foreigner. Please share tips or experiences on overcoming language barriers in Korean workplaces.