There is no automatic way to obtain low, med, high level workers. Most people find the best solution is to set up a high education index, 180 - 200, then go at the top of the country page:
Departments - Labor - Change profession of some workers
Then change profession of educated workers (managers, high tech, teachers, etc...) down to low, med, or high level workers as needed. You can change up to 200,000 jobs per game month.
Looking at your main country, please note that the education index is based on your worst index of elementary, high school, and university; raising one extra high without the rest offers no real benefit, they need to remain balanced.