I'm working on a migration project of pyspark. I have an understanding of the script code. I can build code logic. But somewhere feeling like that is not enough

I'm working on a migration project of pyspark. I have an understanding of the script code. I can build code logic. But somewhere feeling like that is not enough while switching. Wondering what more skills I require as a pyspark developer or data engineer .

Please guide.

Need assistance/Career guidance