You can always advance your advance your C++ skills further. It is a well guarded programming language few people know how to use. It is one of the few languages that gives you the power to squeeze a lot of power out of the hardware.
However, if you know C++, you should be able to pick up Javascript/HTML/CSS/PHP in a snap. I would guess 6 months.
However, if you know C++, you should be able to pick up Javascript/HTML/CSS/PHP in a snap. I would guess 6 months.