Can I be eligible for a green card after being granted Cancellation of Deportation?

Whenever there is deportation involved, I always suggest contacting an immigration attorney.

Can I travel after my biometrics ?

Without knowing what the biometrics are for, it's impossible to answer your question.

I got my ss card with a restriction on it that says valid for work under dhs what does it mean actually can i do any job in US ?

You do not have a green card yet. You can only work because you have an EAD card.

I am an F1 student and have filed for my PRE-OPT and am yet to receive. Am I allowed to work until the EAD card arrives?

You are not allowed to work before you receive your EAD card.

I212 Boston office approval or denied time?

You should reach out to your lawyer and request an update.

If you are the petitioner, you should file as petitioner. The applicant is usually a person who tries to obtain an immigration benefit for herself.

I got approved for my i360 under vawa US spouse widower, how long i can wait to file, I mean how long my i360 is good to be file

I am not sure I understand what you are asking to file. More info needed.

Is there anything at all that can be done to expedite the process? Please help.?

Your best bet is to contact an attorney because your case is very complicated.

Can a DACA recipient get a business license?

What you need is a work permit, and you should be fine. If not contact a lawyer.

Regarding question about STEM and marriage green card

It is a matter of preference but typically, by marriage tends to go faster.