Shader Graph Questions ( White Texture - Shader Graph + vfx)

Hello everyone, i am a beginner in unity and i would like to ask some questions i have in same post. I am using Unity 2021.3.25f1

  1. When i import a Texture 2d i have into the Lit Shader Graph it looks completly white


and it looks like


what should i do to make view okay ?

  1. Is it possible to use a Shader Graph in Visual Effect Graph ? i want to create a rainbow glowing Shader Graph then want to apply that shader to my Particles generated link text but whenever i try to do it it is not transparent anymore link text