What free architectural modeling software is good for beginners?

[VictoriaR]

I'm an architecture student looking to get into 3D visualization. What free architectural modeling software would you recommend for someone starting out? I need something that can handle building design, interior layouts, and basic rendering. I've heard of SketchUp Free, but I'm wondering if there are other options that might be better for architectural work specifically. I'm not looking for professional BIM software yet, just something to learn the basics and create decent visualizations.