Well, for me, you see, I'm acceptable at both. I haven't made any tutorials but.. you can see my drawings and how I've made them. They're all boys. Though they're all bishonen. So, if you know how to make a girl, you probably won't be too bad at making a bishonen. But you still have to make him somewhat recognizable as a boy. Make sure to include some more boyish characteristics. I can't quite think of any examples.. just as long as he doesn't have breasts.. or an extremely girly figure.
But if you don't want to make a bishonen, I can do that too..
I just like bishonen..