Surely he could get away for a couple of hours a week and do a few hours of homework a day, with his daughter's help. 

The problem seems more that he is in a vicious circle of learned helplessness, depression and despondency, getting out and broadening is horizons with a language course might be just the ticket out of it, IF there were free, conveniently located and scheduled language classes, but are there?

Germany went all out to provide its refugees with language and cultural training, skill retraining, social integration activities, etc., we seem to have left them to their own devices in in regards to anything but basic physical needs.