I wouldn't worry about the study - it's less time consuming than the job you'll get at the end of it!
I did both courses full time (pre family) and they are, basically, full time. I had lectures in the morning, study group most afternoons, and then I guess about 2-3 hours of study per night, more around exams, much more.
The exams were pretty hardcore - 7 in 7 days!
This was the GDL, the LPC is less time consuming (but more boring!)- probably 4 full days per week.
So no worse than a full time job.
This was at the College of Law, 9 years ago, so obviously things may have changed.
Any other questions, let me know, happy to help.