I have been taking Russian language lessons for a couple of years, always in Ukraine, since the recent situation, I decided to take lessons in Kaliningrad, because I realized it's quite easy to travel from Berlin to Kaliningrad with many options available. So I contacted the Privet Russian school, and I was so glad because they organized my travel, stay, and visa support just perfectly. I took 14 days of individual lessons, the teachers were excellent, and teached me with patience and kindness. The school management took care of everything else, so I felt very welcome and safe in mother Russia. I recommend the Privet school very much, and hope to come back soon. 
Best wishes, Karim