[mtrn]

Asset allocation - so to speak - over one's personal time is usually a very personal thing. Six month is a long time, but it is not enough to get reasonable good in piano playing. Or to acquire a black belt.

If you have a bit of talent and help, you could get fluent in a foreign language in 24 weeks.

But then, there are some talents, that you wanted to foster during the last years, but just did not have the time. Maybe it's easier to start from there.

Anyway, some suggestions into the blue:

- read books and travel

- learn excellent writing skills by writing a short book about what you learned so far in math/finance

- move to a foreign country where you do not speak the language and try to survive (two of my friends did this, and they did well)