Due to ton of compatibility issues, its best for a starter in Datascience to use anaconda python distribution. It can be downloaded in the following link.
https://www.anaconda.com/download/
Select appropriate version for your operating system and install.
Once installed run Anaconda Navigator from start menu
Click on Jupyter Launch Button
your browser should open displaying jupyter notebook.
A detailed tutorial of using Jupyter Notebook can be found here https://tinyurl.com/y6umoqvm