MBA/PGDM

Yes, you can pursue MBA from Australia. First, you need to qualify the GMAT exam.

Being a B.Com graduate, you can pursue CA, CS, LLB or MBA.
In order to pursue LLB, you can appear for the entrance exam of LLB conducted by the University of Delhi.
In order to pursue MBA, you need to appear for entrance exams like CAT, MAT, SNAP, XAT and NMAT.

If you are doing part-time MBA or Distance MBA then universities are not concerned about placements. You have to search for a job yourself. Regular MBA is a better option if you are not working anywhere.

You need to have at least 3 years of work experience to pursue a part-time course through distance. For more details, you may visit the websites of Bharati Vidyapeeth and D Y Patil University. Both of them offer MBA through distance.

No, it is not a good choice. The infrastructure and faculty is not good. They may spend a lot of money on advertisements, but results are not good.

There aren't any private institutes to pursue MBA in agribusiness. IIMs and Institute of Rural Management, Anand are the most preferred and recommended institutes for MBA in agribusiness.

Firstly, clear your backlogs.
In order to pursue MBA, you can appear for any of the following entrance exams:
1. CAT
2. MAT
3. CMAT
4. SNAP
5. NMAT
6. MHT-CET

After qualifying the entrance exam, you need to qualify the GD-PI round. Some colleges also conduct the psychometric test.

You can appear for CAT, XAT and MAH-CET. You also have a chance to secure admission in SPJIMR, NITIE, SJMSOM and JBIMS. You have to invest your time for preparation, then you can score a good percentile and receive calls from the above mentioned colleges.
Best of luck.