Since you are in your 5th week of self-study (독학), video guides can help with finger positioning:

: Provides an interactive player that allows you to hear the bass part soloed and follow the rhythm precisely.

: Offers a professional, easy-difficulty arrangement specifically for J-pop bass learners.

: This video shows the full score on screen as the player performs, which is excellent for visual learners.

For a complete paper copy including both 5-line staff notation and tabs: