I am overemployed

I have 2 jobs, Job1 is at a big company which give RSU too J1 is 1620000 rupees plus 4.5 lakh stocks

Recently got second job which is not a job but i am a individual contractor which pays me 4k usd monthly

How i can save taxes and what are the best ways for it Thinking to apply for gst number for job2

Edit : both companies allow moonlighting I have very good social life J1 moring 6am to 3pm J2 morning 9.30 am to 6.30pm I go to gym with my gf and friend at 7pm to 9pm I sleep by 11pm Weekends i am party bird, stop advising on social life tell me about taxes and investment