From your post, you are scared of riding your horse at a pace higher than a walk in your sand ring, I doubt that what you need is exciting places to ride.
You need to gain confidence first.
A controlled environment is the place to start.
If I were you, I wouldn’t go on a hike with this horse until I was confident enough of its reactions and my abilities to fully control it if it loses its mind.
Get to know and trust your horse first.
It might be boring but there is no point in getting hurt or more scared.
Start the work in the sand ring and the fenced pasture.
A little drug can also do wonders on both the horse and yourself when you’ll feel ready to explore those 65 acres on your own.