Studying University online while flying GA

[pull-up-terrain]

For a long while now it has been my dream to become a pilot one day. After reading the current situation at Qantas, Jetstar, Cathay and seeing how Dad wished he had a backup career in a non-aviation related field I'm starting to realise how important it is to get a backup career. At this stage I'm currently thinking of doing a Bachelor of Science with Open Universities Australia because if becoming a pilot doesn't work out I could use this degree to get into postgraduate dentistry or use it to be eligible to complete a Diploma of Education and become a maths and physics teacher.
My questions are:
Has anyone here studied university online?
How hard is it to fit in studying university online while working in GA?
On average, how many hours a week did you spend doing the doing the course?
Are there any other degrees/back up careers you would recommend doing instead of a bachelor of science?