Welcome to Chordie. Give your wife a big smooch for getting you a guitar.
Generally the chords in those charts aren't placed exactly right. And sometimes they allow a lot of room for interpretation. Given that you're a beginner, you are in the PERFECT situation to arrange difficult passages and use the excuse "Hey, I'm new at this!" I use that a lot. Although, people are starting to question me on that, and it's probably time for another cheap excuse. Guitar playing is TERRIFIC for coming up with cheap and/or humorous excuses.
You'll get into the hang of the chord placement. Youtube is also a valuable resource. Not only can you generally find videos of original artists doing the songs, but you can also find guys like Fretkiller (a bit of a legend on Chordie) who does terrific acoustic arrangements and his videos are closeups of his fretting hand showing you EXACTLY how he does it. (Please note that this guy is terrificly talented and makes everything look easy. It isn't.) Once you get some basic chords down, I'd recommend going over to Goldhat. Search on "Goldhat Lessons" and you'll find some good arrangements of Sissified Seventies Folk/Pop music, which is my favorite genre.
There's a million good resources. Probably www.justinguitar.com has the best beginner lesson and skill development plan of any free resource.
Good luck. Have fun. Stick with it through the initial finger pain. It IS worth it. It usually takes about a year to get to where you can recognize something, and longer before people start wondering whether you brought your guitar with you when you go somewhere. But stick with it, enjoy the journey, don't be too hard on yourself. If you can follow that advice, you just found yourself a lifetime of challenge and fun.
- Zurf