IMO, the knowledge side of GUE courses is secondary to the hands on skills.
If you want to get a "leg up" on the courses, find some local GUE divers to go dive with. Mentorship would go a lot further than reading the course notes.
If you want to get a "leg up" on the courses, find some local GUE divers to go dive with. Mentorship would go a lot further than reading the course notes.