I had a similar problem.
I cleanly uninstalled anaconda and repeated the same process you mentioned but by using miniconda instead of anaconda.
If you don’t know, miniconda is same as anaconda but not all libraries are preinstalled. Now you can use the command:
conda install jupyter
to install jupyter notebook interface.
After all this, I have no problem in importing ROOT in Python.
But I still have the issue of Kernal dying if I choose Root C++