Is there a main trail/sidewalk that takes you through the park?

Yes there is

Yes and coming soon there will be a tunnel under fluer Dr you can get anywhere in the city using the walk ways

Nice walking paved trails.

I would suggest driving through and checking it out first

There is a really nice walking/biking trail in the back of Water Works Park where you over a walking bridge.

Everyone walks on the side if the road. Ir you can take the bike trial.