LTVP self employed, how does it work?

[Triteia]

Hello, a little background here.

I'm a female Malaysian, married to my spouse of 5 years (SC for about 2.5 years, previously was a PRC). I am still holding LTVP and not given LTVP+, probably due to my husband's unstable job. I have a kiddo aged 1.5yo currently. Really hope to get my PR soon when my husband's job is stable (he's self employed).

Kiddo is going to attend preschool for the first time and I plan to do trading online + private piano tutor (previously was holding EP, working as piano tutor in company here before kiddo comes).

Can I do my trading + tutoring? Or either one? And how does it work? I am secretly hoping to get the childcare subsidy.

Many thanks!