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Ok, I don’t even know where to start with this one. It’s free, if you want a degree you’ll have to pay for the paper but the courses are all free.
Each course is the standard college course load, something like 14 weeks, 8 hours (at least) commitment a week. If you’re working full time or in college right now, be wary of the commitment. You can, I’ve been told, get the course information without committing to the exact schedule and do it on your own time but you won’t be eligible for the certification.
Here’s a few relevant courses: Programming with C# Learn to Program Using Python How to Code: Systematic Program Design - Part 1 Paradigms of Computer Programming – Fundamentals
But they have everything and it’s glorious.