My first advice is to keep the gearing low, so you can benefit from spinning. All my street FG bikes are geared between 60 and 70 gear inches (gi). Since you have brakes, you won't have any problem exceeding your cadence (rpm) comfort zone on downhills. I've seen many geared riders get on a FG, and within 15 minutes they feel comfortable, so I don't think you'll have any problem. A few times you'll forget that you can't coast, hop the rear wheel and get a bit of a scare, but other than that I don't expect any problems. As to backpedalling, it's simply a matter of reversing the force on your legs as they are still moving forward, pushing down with the rear and pulling up with the front. Practice a bit in a parking lot before heading out on the road.
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