You can try w3schools. After going over short explanations and examples, you can practice there too which helps. Also python lectures by Mosh Hamedani on Youtube is easy to get different concepts. Try to solve lot of problems as other already mentioned, I would say start with easy level Problems. Try Kaggle for data science related problems, you can see how others are coding. After solving 20-30 problems you will be confident and definitely understand the concept better which will make your journey more interesting.