Okay, so there's actually almost no light hitting the scene because there's a bunch of foliage over there obstructing the light. I think your issue here is you're working from a bad reference. The values on the scene are really subtle because there's barely any light and the brightest area is that glaring sky in the back. You want the buddha to be a focal point but you can barely see it in the original image. You could let go of the ref at this point and do the lighting on your own, but if you don't have a good understanding of how light works from experience, that would be difficult. I would personally recommend calling it a day on this one, you got a great perspective study out of it, and move on to either a better photo with simpler, clearer lighting, or even do some studies from life instead. But it really depends on what your goal is with this piece and in general.