- If the weather is so bad that you can't make out objects in front of you, the logical thing to do would be to safety pull over and park. This argument comes up quite often on these boards. What you're essentially saying is "I couldn't make out the objects in front of me, so I continued driving blind with no regard for what's in front of me".
- Signs are regulated. They are all the same size, same height, etc. If they weren't, people would complain how it's impossible to follow signs that are placed just anywhere. You'd never know where to look. "Making bigger signs" is not the provinces problem. At the end of the day, following already strictly regulated signs is yours.
- Signs are also made to be reflective. If it's so dark outside that you can't see things, you can always turn on your low beams. They aren't just for 30 minutes before/after sunrise/sunset. If the conditions get so poor that you can't see things, feel free to turn them on. It's not just for you, it's also for the people sharing the road with you.
- It's irrelevant whether or not someone made the same mistake or you are unfamiliar with the area.
Insurance wise, it's a minor offense. Swapping it out for another minor offense is not going to change anything. All minor offenses are treated the same.
On the other hand, you're a novice driver and it's always nice to avoid points when you can. It's not going to do anything for your insurance, but another ticket like this and you run the risk of being suspended.
You can always request a trial and go from there.
Good luck.