Exactly what planetnine said. You want at least two captures of the sound using two different mics. I'm sorry, but 58s won't get you far with an acoustic. To my mind (and I am a guitarist/producer, performing and engineering since the mid-'70s), acoustic guitar is about the hardest instrument to get perfect. It can make or break any album that features it more than marginally. We all have in our heads some of the classic albums that had some version of perfect acoustic. And that is part of the problem: even the most unmusical listener has several versions of all-time great acoustic tone imprinted in their brains. Most know instinctively when it's duff or 'meh'. Those Fishman as a third to mix in? Fine. And I know they offer some great models of those sort these days, but those were made to do live sound really, to save the hassle of live mic'ing. It takes lots of time, experimenting and practice, if you are new to recording the instrument, but you will get there if you invest the effort. Start with planetnine's instructions and go from there. Also, the ROOM makes a big difference with acoustic, but you probably already know that. Don't go overboard with FX processing unless that is absolutely the only way you can cover up a less than A or A+ job. On a good take, less FX is more. Finally, you can't make a silk purse out of sow's ear, so if you are recording your beater guitar, it will end up sounding like an enhanced beater guitar even if you have knowhow. Try to borrow something really top-of-the-line -- you'll be so glad you did. And KNOW the the guitar you are using. You don't want any surprises on an acoustic; they can be extremely unforgiving. Cheers and good luck!