i found this wonderful online resource for preperation and legal knowledge.
https://www.youtube.com/channel/UC7MhU83g0XTkDRIELQkUIwg/videos
It starts with some Jurisprudence Lectures:
https://www.youtube.com/watch?v=PyKMiTkI9aM&list=UU7MhU83g0XTkDRIELQkUIwg