Internal gears aren't necessarily a panacea. If something goes wrong, they'll be more expensive to repair. You also might not notice a problem until it turns into a major repair.
With a 3 speed internal hub, you'd also be at the mercy of the bike designer: The three gears might be hard, difficult, and impossible! If you get a bike with more speeds, then you can hang out in the easier gears if needed.
If you want simplicity, I'd recommend a bike with 8 (or 7, or 9) speeds: One chainring up front, and then multiple cogs in back.
Elsewhere it has been suggested to not think of REI as a bike shop. Instead, it is a store that also happens to sell bikes. It might actually be a very good place for Jude to get a bike - most of their customers are probably casual riders.




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