Hi wilsonstc,
In answer to your question;
1.theory exams including bak before doing rpl flight test (no more gfpt). Then ppl theory then ppl flight test
2.study at home! Personally I like bob tait text books but any are fine really . Take exams when you get here
3. 50hours to ppl is possible BUT not common. Many take 70 something. Hope for the best plan for the worst.
All definitely possible part time/during your holidays.
Best of luck with it all!