I learnt Java in 2 months from 0 (or 0.005), a year before going to college. (the full experience™️; not just String, while and sysoCtrl+space)
On "Data Structures and Algorithms" class, the teacher says something like "usually OOP takes like 2 years to learn completely".
Me in my mind: "Aaahh I'm so proud of myself. *selfhugs*"

Of course I knew the teacher was exaggerating but even if she doubled what she thinks, I still was in the cool range. B|