Ask HN: What online courses for beginners you recommend

I have a friend that’s really motivated to start learning to code at the age of 26. It would have to be from home. Will have about 20 hours a week available. Also, will probably start with Python and web development just because is where I could help with the beginner stuff.

We are considering sites like Udemy, Codeacademy, treehouse and others. Would be willing to pay if it’s worth it.

Which courses would you recommend and why. Some sites offer certificates, does that really help ?