Free python courses

Hi everyone, I’m trying to start with programming and I’d like to learn Python. I’m looking for free courses to get started. I came across this website: https://pythoninstitute.org/ but I’m not sure if it’s worth it. They do have a certified exam after the course but you have to pay for it. Has anyone here taken any of their courses? What are your impressions and experiences? Thanks in advance for your feedback!