Welcome, Hokie Jim! (I'm assuming; after all, you
could be at Radford U. rather than VaTech. Â

) I grew up in Lynchburg & was one of the relatively few males in my high school class who did
not go to Tech, so I have standing to use the local dialect.
When I returned to riding a year ago on Labor Day weekend after multiple decades of no activity, I
specifically looked for an R65 after a considerable amount of study. Here's why:
I'm shorter than you, considerably older, and have become more comfort-loving than I once was. I found a 65 locally, bought it, and have never regretted my choice.
The R65 has more than enough low-end torque for slow riding on the hills in and around B-burg. It's extremely responsive, agile, and stable, and can hold its own in both comfort and handling at speeds up to 65, perhaps more. (YMMV) It has an unusually low seat height for a BMW, making it an excellent choice for a smaller person. The bike is
very light for a 650, weighing 452 pounds, fully fueled. At 5'8", you should have no problem with a standard seat and shock configuration. But if it feels uncomfortably tall, the seat can be altered or shorter rear shock(s) can be installed to lower the bike another 1/2" or so. As a writer pointed out on another web site, it doesn't have a lot of expensive plastic and chrome, so it doesn't cost a fortune if it gets dropped a few times. Summary: if you want a bike that's a lot of fun at sane speeds, I think if you can find an R65 in good shape, it would be perfect for you. (If you want something to scream up and down I-81, that's another matter.)
Someone has already recommended Haynes and Clymer. I agree, but I suggest also finding an owner's manual
for the specific R65 configuration you end up buying. BMW exported several versions to the USA 1979-1987. (There were more versions worldwide, but they weren't officially sold here.) I say this because my Clymer's, despite covering my R65 (among other sizes for the period), talks about things that are totally different from what's on my bike. The correct owner's manual can clear up the ambiguity. There are folks in this forum who know far more than I, and can help you find a manual and give you technical help when the time comes.
You might check out Blacksburg & Roanoke to learn whether there is a BMW community, hopefully with some airhead owners. The R65 is extremely owner-maintainable (except for a few major tasks), but there's a learning curve that the manuals sometimes don't address adequately. Lynchburg has both a fair number of riders and a dealer (Hammersley), but that's a long ride if you need to have work done. (Some Carolina dealers might be closer.)
Good luck & keep us posted.
John