Hello Robin,
First off - Welcome to the forums and welcome to the world of real estate.
So, if I may let me ask a question: Are you going to the major franchise offices such as C21 and Prud etc. I think this may be your best bet in the beginning as they offer quite a bit of training to new agents.
A few things to remember:
The interview process is a two way street: Not only are they interviewing you, but you are interviewing them as well. So, try to relax if you can. They need you just as much as you need them.
One thing that comes to mind for me is your part time status and offering to do computer work. While this may seem like an advantage to you (since you are familiar with computer and know the potential) it may not be an advantage for a broker. Specially if they have to spend money to do something. My background is also I.T. (over 25 years) and I did not mention my background to the brokers I interviewed (notice I did not say who interviewed me). I did not want them to know my background in case they were bringing me in to fill a lack of computer experience. After all, I'm entering the Real Estate business, not the computer business (of which I have retired from).
Brokers are in the business of selling real estate. Some are computer savvy and realize the benefits of technology and some are computer phobic (I happen to work for one that straddles the line, hehe) or are not clear on the benefits.
Perhaps the concern from the brokers perspective may be, if you are working on all this computer stuff, when will you have time to sell real estate since you are part time anyway.
Therefore, my suggestion to you is this: Forget offering computer work during the interview process, don't even bring it up except to say something like: "I am computer literate and know my way around a computer fairly well".
Focus instead on your excitement as you enter a new career. Display your eagerness to learn, and willingness to exceed.
Once you are in the door, you can then start offering your other talents.
IMO, the best advice anyone can give you is: Be Yourself...
I hope this helps you towards starting your new career.