Hi – I live in a house with an indoor atrium – there is a 6′ x 6′ skylight above. When I moved in, there was a fiddle leaf fig growing in the atrium. It was about 5 ft tall. A year later, and it’s about 12 feet tall/long, supported by ground stakes. It’s very healthy. Some of the leaves are a good 18-24 inches wide. Dark green – very happy plant. It’s more of a vine habit than a tree, as it is growing straight up rather than branching out. How do I prune it back without shocking the poor thing. I had no idea it would get this large since I’ve never had one of these before. It is not in a pot – it’s growing directly in the ground in the house atrium. Where do I start? Thank!