Don't worry if you don't think you'll need a suspension. I just wanted to make sure you had considered them as well. Like a person buying a car would consider a compact, midsize or luxury, then pick the one that best fit their needs/budget. I'd say most people only give the luxury a passing thought.
A suspension fork can help with control, but a rigid frame will help you learn the skills better. The steel frames are also usually better for longevity.
Happy Trails!