Can LTVP holder declare as self employed?

[Triteia]

Hello! I'm a Malaysian female holding LTVP + a Singaporean child (1.5 years old). Married to a PRC turned Singaporean 3 years back. Married for about 5 years already. And yet unable to get PR due to husband's unstable job. I am doing private piano tutoring for a few students when I'm free from caring my child. Any ideas if I can declare that I'm self employed? I plan to increase my student counts after sending my child to childcare.

[Barnsley]

Hello! I'm a Malaysian female holding LTVP + a Singaporean child (1.5 years old). Married to a PRC turned Singaporean 3 years back. Married for about 5 years already. And yet unable to get PR due to husband's unstable job. I am doing private piano tutoring for a few students when I'm free from caring my child. Any ideas if I can declare that I'm self employed? I plan to increase my student counts after sending my child to childcare.

Are your jobs cash in hand?