Before moving to Active Korean 2, you should be able to:
If you cannot do these things, review the relevant chapters in Active Korean 1.pdf again. Active Korean 1.pdf
No. The early lessons in the PDF might have romanization (e.g., "Annyeonghaseyo"), but it disappears after Lesson 3. You must learn Hangul first. Before moving to Active Korean 2 , you should be able to:
Yes. "Active Korean" is the shorter, faster-paced series for learners who want functional speaking skills. "SNU Korean 1A" is much denser and used for academic credit. For self-study, Active Korean 1 is superior. If you cannot do these things, review the