I think the best possible course for you will be... CS i.e Company Secretary. It is a correspondence course hence you dont need to do regular classes. I am a CS and working as a management Trainee in a Public Limited Company. If you can successfully clear the course then you can even claim for exemption for 15 months management training since you are already working somewhre. And then with a membership no. from ICSI you can work as a legal advisor.
With Best reagrds,
Deblina Mitra.