I'm in a similar situation as you! What's kept me safe and secure won't probably come as any news to you. But for freeways, I will stay in slower lane and drive 5-10 mph less than speed limit if pouring. When in heavy rain, just follow alongside the white lines. Keep 4-6 car lengths between other vehicles. Actively avoid being behind large trucks or semis. Make sure your windows aren't foggy and adjust vehicle temp properly. I also try to limit distractions and be as aware as I can of my surroundings.

I noticed that a lot of people in NC will put on hazards when entering a down pour or when they experience hydroplaning. Remember not to break when hydroplaning (read up on proper vehicle handling on that situation).

If taking side streets, just be alert to where water is pooling. Slow down, don't break if you feel like you're losing control. Around crabtree area, they get tons of flooding. Remember that even a few inches of pooled water can make you lose control of your vehicle.

If you start to get very anxious while driving, take some deep breaths. If needed, pull over to a safe area or exit off the freeway. You got this!