Hiking In Nova Scotia

Unless your mind is set on "Mountains" I don't think you will be bored.
If you really want to go bush book a trip through the Tobeatic reserve. Our largest area of no to few roads. It is a canoe trip unless you really really want to bushwack. Besides you haven't hiked until you've carried your boat.

There are several trails throughout the province. Not too many multi day trails though.
Check out Cape Chignecto Provincial park, Cape Breton Highlands and Kejimkujik National Park

parks.novascotia.ca/content/cape-chignecto-hiking-trails
A few hills here to get your heart rate up.

www.pc.gc.ca/en/pn-np/ns/kejimkujik/activ/camping/arriere-back/rando-ap-bc-hike#Hiking%20Routes
This park has a 60km loop but is primarily noted for its canoeing.

www.pc.gc.ca/en/pn-np/ns/cbreton/
Lots of day hikes in the Highlands not so much multiday. Although you can get permission to go from (I think) Branch Pond to Frany trail. I believe there is some off trail hiking involved there.

trailpeak.com/index.jsp?cat=def&con=traillist&val=custom
Lots of trails listed here, but most are short. Some of these are canoe/kayak routes.