If you can't show enough money in your bank account at the time of interview (we had bank statements for the last 3 days only), you have to talk about your straightforward plan about how to get a job ASAP. In my experience your plan has to answer the following questions:
What is your marketable skillset?
Where is this skillset needed (name at least 5 different metropolitan areas and their job market outlook)?
What are potential employers in this area?
What are your next steps to reach out and do some networking in your field?
What will you do to cover your cost of living before you get a full-time job? (part-time retailer jobs etc, or maybe something you had work experience while still in college)
How will you get the first references from US employers so you can hunt for your next job?
You might not be able to talk about all that, because your interview partner decides what to ask. It is a good idea to have those answers, and to try to get these topics into the interview when it is your time to speak. Be confident about your future as a highly skilled immigrant.
But talk about that very politely and friendly, even if you know more about your potential job. Treat your interview partner (the US consul) as an employer. You have to convince him you are a good catch for the country.
There will be a difference once you have your greencard and a SSN, because now a company can hire you without visa sponsorship. But you will need US references, because HR wants to call people you worked with. So get to know local people, maybe start as an intern, maybe work in retail, work in a non-profit, do whatever it takes to get a reference by your supervisor. You can do short term apartment leases in each metro area to go to meetups and have interviews with local companies. And you can do interview training and work on your resume with this non profit company: https://www.upwardlyglobal.org/ (You need some work experience in your local country to be eligible)
Please do not make things up and lie. You will get caught. Your interview partner is trained to find out if there is something wrong with your story. But you should show up prepared, have a plan, maybe back it up with some printouts, for example your action steps, the websites of Upwardlyglobal, temp staffing agencies in your desired areas, job listings in your field etc.
The more your prepare and rehearse what you are going to say, the less stress you will have at the interview. In the end it might be easier than you think , but if you don't have enough money to start in the US, you don't meet all the requirements for the DV greencard. Simple as that. So do your best to look like a professional and a goal getter.
All the best. It's a great country and worth the effort.