Billy RogersTwo years is a very short time to go into full-time investing starting with no cash but working in real estate full time in two years is more than attainable. As other people have said you should look for a better job and make sure you can live below your means. There are a lot of different real estate related jobs. Real estate agent, mortgage broker, title agent,working in the office of any of the previous suggestions, any construction trade, assistant to an active investor, appraiser, property manager, and there are many many other that are all related to real estate. Most if not all of these do not require more than a high school diploma and a week or two of classes to get started. Personally if I was starting over I would probably get a nursing assistant license which takes about three weeks with a starting pay of approximately 12/hr. I would use that to pay my bills while I attended nursing school to become an RN which only takes two years. It's not related to real estate but they are in demand, you work a 3 day work week which gives you time for real estate, there are full benefits, and has a starting pay of about 30/hr and within two years could be at 50$/hr.
I second @billy rodgers Get a four-plex and live in one. You can actually but as little as 3.5% down, I did. It was one of the best decisions I ever made. I think anyone who is serious about saving money should start like that. Imagine how much more you could save if you had no rent or mortgage to pay.
The most important thing you can learn is to live on less than you can make. It's the little things that matter. Don't drive a car you have to make a payment on, don't eat out, don't buy things you don't need, don't worry about brand name worry about price, and get your family on the same page. Almost anyone can save money if they want to. Once you get that four-plex you should really be able to sock it away if your able to save before that. The hardest part is getting started, after that it's like a snowball if you stick to the plan.