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.
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