Hkw much time does it take to write and speak good english?

Mate, it all depends on one's learning capability i.e. grasping power. Some take less time and some take more time. Take your time to learn anything. Taking time and learning properly is better than rushing and understanding nothing!

Also, don't be disheartened if your peers are learning things quickly than you!...You may take time to learn but you might turn-out to be better than the rest later...Good Luck!...Happy learning!...☺👍