Another hopeful...how do I get in?

So I have no background in computer science whatsoever (aside from a class I took in high school where we used Dark Basic). But I came to an epiphany this morning...I don't dare to say I think I would be good at coding, but I think it might be a career style I would enjoy. I am very analytical and I like to break things down and do basic mathematical reasoning (I'm the guy who counts the ceiling tiles when bored). I also would like a career where I work mostly independently on a project and then come together as a team. I am a teacher right now and going to work is nerve racking every single day.

So I am sure this sub is constantly asked this but, how hard is it really? Are there good online degree program at decent prices? Will they require advanced math like calculus? And, what is the job market like? I apologise if I sound naive.