I am thinking of filing I-130 based on my spouse’s permanent residency (PR), who have been PR for more than 5 years, but don’t want to be a citizen. Now, if I file for I-130, how will it affect my legal status under following scenarios?

Scen 1
Laid off from my H1B job, filed I-130 and am enrolled in junior college ( intent is to take MBA pre-course) and applied for change in status from H1B to F1. Is there any complication in this process?

Scen 2:
Laid off from my job, did not enroll in college, filed I-130. In this scenario, can I stay in US (without any status, just waiting for I-130 to be approved)? If not, what is the solution?

My, other related question is while filing I-130 based on spouse’s PR, will I be able to file I-765 (EAD) concurrent with 130?