I think you can do very well with either the 35mm f/2 or the 50mm f/1.8 lenses. Either one will teach you vast amounts about photography that you won’t be able to get from a kit lens or any zoom that costs less than $1000. And, the sub-$100 50mm is the cheapest way to get there, if budget is a concern. If you want to learn with about the same field of view as the standard lens on a full-frame camera and have $250 to spend, consider the 35mm f/2 lens as an alternative. Either way, you’ll do just fine.