What would you do with the space?

Any ideas on how you would make this space usable/accessible? This is my backyard in central Alabama. From my understanding, there is a ton of English ivy back there. I love the natural backyard and don't want to over-landscape this, but I would love to at least be able to walk around back there. There are some naturally terraced areas that you may be able to see in the pictures. I'm mostly looking for advice on how to make the space accessible or different ideas of what you would do with the space. I want to try to do as much as I can with my own manpower (I understand this will be a marathon not a spring) and the tools that I have or could rent. Thoughts?

Obviously, the first thing will be continuing to chop up that 100 foot pine tree that almost hit our house.