Self-employment taxes on H4. What should I do now?

You need immediate help from an experienced attorney.

My question how long does nvc take to make interview at santo dominigo. Dominican republic ?? I hope it take a month or two

Your guess in true. You should get it in couple months.

My 9 year old daughter is a US citizen but I just became a US resident, can my daughter receive free or discounted school meals?

It should not cause any troubles. But discuss your situation with a local immigration attorney for assurance.

You need advice of an experienced immigration attorney in private.

What will happen with my SSS registration?

Sometimes it happens. Do not worry, you should be fine.

Do you think that this will cause rejection at the visa interview? or What will the CO do with me at the interview ?

I agree with my colleague. You cannot be granted an immigrant visa before fullfilment of your residency.

Do I qualify for DACA in order to work even though I switched visas?

I agree with my distinguished colleague. You do not seem to be qualified.

AOS from Student Visa (F1), based on marriage to LPR (married for more than 3 yrs); could it be approved without interview?

More likely you will get one. Congrats.

If the university issues an I-20 when I have a recently approved H1B (consular processing), will my H1B get canceled?

Please share this situation with your DSO.

Can I just do it for fun? Can I donate the money without running SSN? Or a way without getting myself into trouble? Thank you!

Make sure you do not get in trouble for fun.