Update: I finished changing the oil return hose and cleaned the throttle body and idle Valve

Note that I did not change the upper hose or the CCV. But now my car makes white smoke and it’s very embarrassing…. Can’t drive it.

My question is why it did not smoke before changing the oil return hose ?

My theory is the old oil return hose was so melted that wouldn’t let any oil be vacuumed up ,,, and that means I need to replace CCV itself … am I right ?