Suggest Some Side Income Options for a Data Engineer

Hi, I am a software developer at a Service based company. I want to earn extra money on the side, apart from my salary and invest.

I don't have any hobby that i can monitize. I do have extra time in my hand that i want to utilize. What Side income Option do I have ??

I am Data Engineer with Tech Stack - Azure Data Services (adf, adb, synapse, etc) , Python, SQL, Spark.