If by crazy roads, you mean, very busy, then I would suggest finding some less congested areas to ride until you feel more comfortable. If you are scared, then that is your own instincts telling you that perhaps it is beyond your current riding skills.
In any event, beyond that, be prepared: Carry a patch kit, but more importantly learn how to patch a flat tire and fix basic mechanical issues. (Actually go so far as to do an actual tube, flat change on both your front and back tires...so any issues that may occur, occur at home, as opposed to 10 miles from home with a dead cell phone) Learn how to stay hydrated, and eat properly (on rides longer than 2 hours).
At the very least make sure you and your bike are fitted for each other. This doesn't mean it should be a pro fit, but at a minimum that the saddle height, stand-over height and handle bar reach is comfortable and efficient for you.
At some point, look to invest in some cycling gloves and shorts (they don't have to be lycra) There are many types of bicycling shorts designed to be "normal" looking but have a chamois padding for your butt comfort.
Also eventually look to invest in some clip in pedals and at least a mountain or walking type clip in cycling shoe. As your mileage increases, the added efficiency and comfort these supply are worth their weight in carbon fibre...
Build up your mileage, don't try to bite off more than you can chew...Start with sensible mileage for the first couple of weeks and steadily increase it as your strength and endurance and ability to stay on your saddle increase.
Contact your LBS (Local Bike Store) and see if they have any weekend or nightly rides...not club rides, which can be hammer fests, but beginner level relaxing rides. If anything you may make some new friends, but more importantly, you will discover better roads to ride on, and perhaps pick up a few tips and tricks from more experienced riders.
best of luck,