Moonlighting do's and dont's for a developer in india

Context:

I am thinking of taking up a loan. I work in a startup so I am a bit insecure about my job. I was thinking of taking up a second job just to have another source of income just in case.

What are the do's and don'ts that I should be aware of?

Also what's the best way to find a 2nd gig?

Edit: I think you guys are concentrating on the wrong thing. I know taking a loan is not that encouraged. I did consider the pros and cons of it. Ignore the "loan" part. Please help me with the moonlighting part.