Will I be better off waiting and applying for L2 or going on a B2 visa?

A domestic partner residing with the sponsored L for at least 2 years abroad may be granted a B visa and enter the US on B.

Is this feasible and will it work?

Departure from the US without an approved travel document will abandon the green card. It should have been filed with the I-485.

Does the birth certificate have to be in native language while applying for I-485 green card step?

A birth certificate translated to English then has an original in Arabic available to be submitted. Contact the records registry in Saudi Arabia.

Do i need a VISA to travel to Puerto Rico from the United States? Or i can just travel using a valid US issued driving license?

No visa required for travel within US and US territories. DL and proof of TPS may be of need if inquired.

Can I travel outside US while my H1b Visa application is under processing (picked in lottery)?

1, an H1B lottery petition will not be rejected / cancelled by travel, 2, an H1B lottery petition does not impact a return to the US on H4 visa.

Renewing my O-1 visa with new petitioner and employer, would I be requested to submit previous W2 income ?

We would expect O-1 extensions to require evidence one has maintained status for an extension with change of employer.

If form I-129 petition filed at USCIS is denied, is it considered Visa refusal ?

I-129 denial is not considered a visa refusal.

1, one may work remotely from Canada and maintain H 2, if beyond the 6th year of H would be subject to lottery, otherwise not 3, subject to...

H4 or Cross Chargeblity

We would recommend H4 to maintain underlying status and permit H4 travel if need. AND, AOS with cross-chargeability. Otherwise, AOS alone.

E-2 status?

An E-2 US Consulate filing will require full documentation in an E-2 application as a new E-2 where a visa was not obtained before. Consuls are...