[tasogare]

Imagine thinking learning ONE phoneme is a hard task... Please never have a look at Arabic or you'll have a stroke.

Moreover [ɾ] can be replaced by [l] perfectly fine and the vowel devoicing is not something you need to do anyway (it's not even occurring in all dialects). So even searching really hard for "difficulties" you can't find even one thing that is remotely difficult which just proves my point.