Dear Ola,

I think this site is convenient to use:

https://www.learnpython.org/

You can go through the whole site in 3 days maximum.

Then I strongly recommend learn some module like:

matplotlib: https://matplotlib.org/

scipy: https://www.scipy.org/

and numpy.

There are a lot of tutorials and if you have a problem check stackoverflow and search your question.

I hope you find it useful.

Reza