Hi Mitch...
I will be brief (and focus on the management prong of your question) and talk about how I started landlording/real estate investing. First, I would absolutely manage it yourself as you are right there and the experience is invaluable. Second, I started with these books: Landlording (by Leigh Robinson) and Nolo Every Landlord's Legal Guide (though they make books on tax, tenant selection, and even management; disclosure I just authored one Nolo title, but was a reader for ten years prior). There are many more out there--but if I had to read two or three as a crash course for running your rental, these would be my go to books.
Remember, the beauty of the multiplex is economy of scale, so when you mow your side of the lawn, mow their's, too. Same for cleaning gutters, etc. Plus, you have zero commute to fix anything. Bear in mind, being that close can make you very available, so set some good ground rules early on when you do your tenant onboarding process and really select carefully.
Also, on the lease terms--look some at your market. I personally prefer starting with 6 or 12 month lease because it gets me people with a longer term orientation (and most of your work is in the turnarounds where you clean and prepare the unit, post the ad, do the showing, screen and select the tenant). So more turn over is more work. But that said, I often let the year lease go to month to month if the tenant prefers and have had tenants stay as long as 6 years on a month to month basis (incrementally raising the rent as appropriate to the market). That said, if you live in a seasonal resort town or everyone in your area is going month-to-month, then that is your answer right there...
Read voraciously (real estate books, websites like this one, and all the rental ads in our area, etc). You got this and can do it...