Can I start working on h1b receipt ( on basis of approved I-140)

You cannot begin working on your new H-1B until it is approved. You cannot work on just the receipt and I-140.

My DACA got renewed, but i haven't receive it in the mail, can i still travel inside the US?.

You are safe to travel by plane with your California ID, and should carry your DACA documentation just as a precaution. Since your permit was...

H1 to green card process

No need to visit the embassy after filing for adjustment of status so long as your H-1B is still valid. There is no stamping process like the H-1B.

You won't need more time to find a job if you plan to study with F-1 because employment is not authorized the first year of F-1 status. Either way,...

To become exempt from Iran's military services, I acted like insane people and now I want to get USA visa. read my story:

There is a medical exam required for an immigrant visa, but I believe it is more concerned with communicable diseases and not your mental health....

Interview at Consulate for O1-B visa.

It depends on what your basis for eligibility is, but generally they will question your past achievements, employment, plans in the United States,...

Is there any regulations of hours and compensations for work to get O1-B visa ??

No. Usually individuals who qualify for the O-1 visa do not work standard 40 hour work weeks nor have hourly wages. It would be highly advisable...

IMMIGRATION I-130

Remedy your housing situation for your own good, but it will not have any impact on your petition for legal permanent residency.

I would bring any documents that you have to your interview, and also truthfully respond on Form N-400.

As my colleague suggested, you may have trouble getting another student visa because you have previously intended to stay and live in the U.S....