Can I adopt my non-immigrant nephew without going through USCIS?

Yes you may adopt him, but if you want him to derive any immigration benefits, then you will have to do it via USCIS.

Can my sister continue to visit from russia on a tourist visa while I have a pending I130 for her?

While she has her current visa, yes, she can continue visiting you. However, please keep in mind that the visitor's visa has an intent of returning...

Deferred Action does not lead to adjustment of status. Unless you have independent basis for adjustment of status, you cannot apply for it. Your US...

Name change for Resident Immigrant

If you took your husband's last name, yes, you may change your last name for your green card as well.

On Form N400, Part 9, first question is How many sons and daughters have you had, i haven't had any..

You can put 0.

Eligiblity critieria for Green Card:

Not EB-2, as that is for advanced degrees, such as Master's and above. Possibly EB-3. You need to discuss with a competent immigration attorney.

Priority date?

Your priority date is the date your Labor Certification was filed. The entire process for labor certification can take from 6 months to a year and...

Can I file !-485 concurrently with I-140 in the EB2 NIW category, given that I am an Indian...

You can file these forms concurrently IF your priority date is current. If it is not, you cannot do so.

Would I b able to apply for financial aid if I'm eligible for deferred action

Unfortunately, no.

Am i eligible to file i-360 i-485, i-765 together?

No, as a victim of domestic violence, you have to file I-360 as a battered spouse first, and only after it is approved, you are eligible to file...