I haven't driven since 1982, and I learned to drive late in life, in 1965 at age 28. I can remember what worried me most then. I imagined being stopped at a stop sign on a side street, about to turn left onto a busy highway, and not being able to judge when it was safe to do so. Drivers would pile up behind me & start blowing their horns. At length I would panic, head into a gap that was in fact too short, and cause a collision. It never happened.