Will my husband and kids welfare effect me when it's time to apply for naturalization?

Hopefully will have no negative effect on your eligibility for naturalization.

How could i find out if my immigration visa is become current or not?

The monthly published Visa Bulletin is the way to go. Each month, around the 9th, next month's Bulletin is being released by DOS. Make sure to...

What are my options?

Best to continue seeking an employer willing to sponsor you, while at the same time continuously eying "plan B", i.e. marriage to a USC for love.

Pretty much any "purpose of trip" reason should get your AP approved. No need to sweat over it.

Is it possible I can adopt my 2 year old Nephew from india?

Yes, that is perfectly feasible. Make sure to work with competent and experienced lawyer on both continents.

Don't have my orginal humanitarian parolee card for I485 interview?

No worries. A legible copy of the original will be as good.

Can we stay in America In H1 visa for child’s treatment?

No. Sorry. For the H-1B extension all eligibility requirements must be met at the time of filing by both the employer and foreign national...

Yes, your step mom can petition you now. You don't have to be present in the USA at the time.

H1-B cap exemption eligibility?

Yes, you seem to be "cap exempt" for another year.

EB-1 I-485 adjudication?

Will most likely be adjudicated on a month when your EB-1 India shows "current" on the Visa Bulletin.