I think finasteride-only will be good for you, man. You're still in the "full head of hair" -club to pretty much anyone, even the Norwood-spotters in here. Sure, you're better off than 99% of the people on this forum, but the onset of male pattern baldness is still something to be worried of, even if most of us think you have virtually no loss compared to the NW2½+ guys at large.
I don't think finasteride will "fail" you, just be patient with it. Even if you get a mini-shed - don't stress it. Just pop that pill EOD, observe if you're getting sides or not (don't get too psycho with this and imagine sides) and carry on with your life, taking pictures of your hair every month or so. I would recommend popping the pill before you sleep, that way you don't spend your day thinking about potentially having some sides (ie. imagined ones), ruining your own day in the process.
If you want to add anything, just go for some Nizoral and supplements like Biotin, staying healthy and all that stuff. minoxidil would be an absolute waste for you.