using python and node.js
I think you're thinking about this problem backwards. Node.js lets you run browser Javascript without a browser.  You won't find it useful in your Python programming.  You're better off, if you want to stick with Python, using a framework such as Pyjamas to write Javascript with Python or another framework such as Flask or Twisted to integrate the Javascript with Python.
I use to program on python. I have started few months before, so I am not the "guru" type of developer. I also know the basics of HTML and CSS.
I see few tutorials about node.js and I really like it. I cannot create those forms, bars, buttons etc with my knowledge from html and css. 
Can I use node.js to create what user see on browser and write with python what will happen if someone push the "submit" button? For example redirect, sql write and read etc.
Thank you