From what the guy at the agency said, it takes time to build up some status in the Entertainment Industry. It could be anywhere from 3 months to 6 months to a year. I totally wanna do both and I bet that I could (I'm in Japan after all), but I really need the money right now and that's why I only have one day off a week. Prehaps after a month or so, I'm might start doing the showbiz thing when I have the time and money.
Hopefully I'll be able to start soon, because the majority of Japanese people here like to see younger performers. I'm 24 right now.