There's https://www.freecodecamp.org/. https://www.codecademy.com/ has some free stuff but there's also paid stuff.

Google also has a few free courses: https://techdevguide.withgoogle.com/paths/new_to_cs/#sequenc...

Also see the getting started guide from r/learnprogramming: https://old.reddit.com/r/learnprogramming/wiki/faq

Personally, at least, I don't learn very well from these resources. I had more luck either learning from community college professors or from videos like LinkedIn Learning (paid). Also heard good things about frontendmasters.com (only for web frontends, not for generalist programming).