HKU SPACE 韓語入門

中大 is better than 港大 in terms of the course plan, the syllabus, the teaching materials and the teaching staff. If you take their course you may learn from level 1 up to level 3. Their courses fit quite well with the Korean Proficiency Test. Even if you go to the other school, it will be easier for you to pick up.
But if you study in other schools, it may not be easy for you to continue your study in CUHK of the same level as their level is a bit high.