Cortney,
Happy to hear you'll be visiting our beautiful Island. Yes, there is the " Hooiberg " hill and it has 300 ( and some) steps that you can climb. The stairs are very stable and have a couple of rest areas. It is not dangerous, as long as you remain on the steps. Locals and tourists climb it every day. It is a challenge though.
If what you really want is to see Venezuela, well, you can see Venezuela from practically anywhere on the shoreline, as long as it's a clear day. Don't have to climb mountains for that.
I recommend you rent a car or jeep ( more fun). There's signage on the road with directions. It's a nice experience. Maybe you can decide for yourself when you get here. Safe flight...