Learning Two Languages

My focus has been on Cantonese for the last 2 years.   Now, I really want to learn more Mandarin.  Obviously Chinese is a handful  and to learn it you really need to devote all your time to it.  However,  I want to do both.  I still need to work hard at Cantonese but I’m going to start putting some effort into Mandarin.

Anyone doing the same with other languages?