Looking for some really good courses

Hi, i am a medical student, recently graduated. I want to go to Russia for my post graduation. I heard its cheaper there. Now i am looking some good courses to learn Russian language quickly. LingQ help but i really want boost my learning. I think this course here - https://echoee.com/russian-courses/russian-language-course/ might be helpful but i want some more option and insights for best courses available. Any suggestion would be much appreciated.