Start small. I believe we all have big dreams but just because you can't make your dreams come true right now doesn't mean you should do nothing at all towards that dream. Why not start let's say a pot of cilantro (if you are a cilantro lover)? That's one thing you don't have to buy anymore at the store and a first step towards self sufficiency. It does not cost much money and you get to observe plants grow and learn in the meantime.