I'll go one better. And this may cause a disturbance in the force. Go read some of the training articles on Bicycling Magazine's web site. Especially the "6 weeks to race fitness" kind of articles. Would I structure a career or even a season around them? No. But is it much more understandable and the path of least resistance to gaining a training program for an event in June? Yes.
And god help me, I'm going to provide a link.
12 steps to winning a P/1/2 race in 6 hours a week
OK, I editorialized the link name but the gist is throw in some intervals so you can go faster.