Hello, so as not to pollute the forum, I will post everything here my work. I'm trying to snowball but it looks very complicated. Do you have any suggestions? I have the objects from my scene but rendering the glass etc looks very complicated 
You can just use the Glass BSDF in its default form and it should do the work correctly. And your scene is looking great, plus the snowman is great as well. Maybe what is throwing you off the the red background. You can add a background like Kent does in this lesson:
The Glass BSDF will work great in Cycles, however not so great in EEVEE.
If you want to use a shader that works for both EEVEE and Cycles, try this...
Don't forget in EEVEE to switch the blend mode in the material settings to Alpha Hashed, and turn on Screen Space Reflections in the Render Properties.