Depending on your interest in games and your tolerance of people who take games too seriously, you could download and play Ingress.
I don't play much anymore, but it's how I've met some of my closest friends (and a bunch of real turds).
Check out Cultivate in Ypsi. Their social calendar is often pretty cool.
That's a rough battle to be having. Went through a similar situation in a condo we were renting. I sealed off all openings from below (plumbing, electrical, etc), and we got a couple of these air purifiers, and that seemed to help combat most of it.
Another thing would be to add a weather strip to the bottom of your door, or put a towel across it to block any air coming in fro the hallway.
Comcast. All other providers in the area are sub-par. If you do go with Comcast, and it's only the Internet package, I would suggest purchasing your own modem and router and returning the Comcast modem, as that will cut $7+ off your bill each month, and pay for the modem in under a year.
https://www.amazon.com/ARRIS-SURFboard-SB6183-DOCSIS-Cable/dp/B016PE1X5K?th=1
Router is your choice.