I taught a three month Perl-course in 2019 in Yekaterinburg (40 - 120 minutes weekly, only 13 lessons ). There was ~15 students and 6 of them left up to end. One of them now works in our company, and yesterday he told me that another student was hired as Perl-developer in another company. I'm very happy about it!

P.S. sorry for runglish (: