If I were you, I'd check around your area for a bike co-op. They often have great deals on used bikes they tuned up, so you'd save money and end up with something as good (or even better!) than entry-level hybrid models. Plus co-ops tend to be staffed by the hugest bike nerds who are sincerely eager to help new cyclists.

If you'd rather buy new, I'd recommend an entry-level (starting at around 600$) hybrid from any of the big bike brands (this advice is a bit location-specific, I'm talking about North America here). I ride a Trek FX1, but all the big bike brands have similarly-featured models.

Whatever you do, please stay away from cheap, big box store bikes. These are usually assembled by people who are not trained bike mechanics and shoddily assembled bikes can easily be dangerous. They also often have non-standard parts, making repairs and maintenance frustrating.