What is the best way to start for machine learning after finishing python ?

Answer 1

if you want to stick to python and already know python to a certain extent but have zero ml knowledge you can try "data science from scratch" and "programming collective intelligence". both are python ml books using plain python and implementing simple ml algos from scratch. When you understand high level ml and are comfortable with basic ml algos, you can start to look at scikit ml python librairies

Answer 2

The best way to learn to program is to program, although in Sololearn you can learn a lot from the challenges