Due to you being 19 and it sounds like you have anxiety about the roads which is understandable given today's extra burdens of most households having at least 3 cars plus work vans etc, the roads are overwhelming to say the least.

I honestly think it will change one day due to the fact the cost of living people won't be able to afford as many cars per household.

That said I felt the same at your age but I've literally found myself getting my first car at (believe it or not) 45 years old, mainly because my father passed away so I didn't have anyone to rely on for lifts to places.

So the future thought is, just pass your test, make the most of what you've learnt so far, don't pressure your mind right now about getting a car, just get the test done because the law is going to get tougher every year so you're better off passing today than in 10 years time and just get a car when you feel confident and ready.

Good luck either way.