Best of luck, Jolt. I did a lot of commuting in the dark. At night, it is sometimes safer (and more reassuring) to use well lit main roads with some traffic instead of dark side streets, especially if those side streets are in questionable neighborhoods. For the same reason, I always avoided parks and even bike trails after dark, but most of those are closed after dark (for good reason), anyway. Be safe. You can do it.
One more thing. In addition to the lights on the bike, I often used one of those lights mounted on a headband that hunters and such use at night. It helps when you need to check something off to the side and it's especially helpful if you have to stop and make an adjustment or repair on the bike because it leaves both hands free. You can usually find these at outdoor stores. I think someone makes a light that can attach to your bike helmet, too.