It's better to play with the original accompaniment of the song, which will be fuller and sound more pleasant. After all, playing pop songs is basically plucking the fingers, which sounds hollow, unlike pipa's large repertoire, which has many fingers and full voices.
In addition, don't play the music too slowly, it's really not suitable for plucking instruments, erhu bamboo flute will be more suitable, and pipa is best to be light. Not long ago, I performed "Hong Jing Dance" with a dancer. I can't stand the slow pace, so I have to sing and play with the original singer. I recommend Lin Xiaoermeng's "Beauty in the Old" and "Wukong", which are much better than the original songs and her sister is beautiful.
If you can play with other musical instruments, the effect is also very good, such as Blue and White Porcelain. Online scores are also easy to find, and you can change them. The sound effect of the voice is always great, but if several instruments are to be played together in one tune, I think I'd better forget it. There is no other function except to amplify the volume.