How do i fix this? (ShaderGraph issue)

Hello everyone! I am newer to unity and i am making a VRChat avatar. I want to give my character the texture of an orca tail but have a water effect texture over it (so 1 material being created from 2 textures via shadergraph). The only issue is, when i connect the nodes in the shader graph editor, the material preview shows its invalid. I tried all that i know to try and fix it, but no luck. Would anybody know what I am possibly doing wrong? Am i missing a node or are the textures imported improperly? I have a unlisted YT video link to show everything relevant to the issue. ( https://youtu.be/zXhP2z6EGYU ) Thank you all for your time and any help is greatly appreciated!