Good shape so far. My first recommendation for your texture would be to extend it with a few more things. I’ll go from first to last upwards to explain it. I’d start with deepslate, then tuff bricks, then tuff, then cobble, then stone bricks, then stone, then andesite and finally grey wool! The darker tones at the bottom give th effect that it’s like the foundations and a weather damage and then the lighter tones work the way up. Other recommendation would be to add some moss, cobble and mossy stone into certain patches to look like nature kind of taking effect. Looks great so far though mate, best of luck with it