That’s amazing!! Great job

I wouldn’t plant from a seed, especially a tree or shrub.

Check to see if your state as a native plant society or you can start here: https://www.audubon.org/native-plants

Gloves, long sleeves, and pants. You’ll need pull the roots out, or you’ll be “pruning” the poison more often than you’d want.

Poison ivy doesn’t like well manicured areas. If you’re walking through property that’s owned by others, I’ll make an assumption that you have permission. I’d talk to the owner and ask if you can take a weed whacker to the area around the path when it gets overgrown. Do that enough to keep it from overgrowing and it might find a new direction to grow.

This needs to be propagated. Grass can be fairly low maintenance compared to other gardening, but nobody should complain about alternatives. I enjoy some clover coverage.

Many many years ago I saw a home in NJ that was all sand with some rock formations. I always wondered how the maintenance was for that. I’d personally never do that, but thought it was interesting.