I have spent a lot of time taking online courses. Here are my favorites.
CS50 ( https://www.edx.org/course/cs50s-introduction-computer-scien... ) - Best Intro to Computer Science
Nand2Tetris I and II ( https://www.coursera.org/learn/build-a-computer ) - Build a computer from logic gates up to a compiler, this is the best class I've ever taken.
Agile Development Using Ruby on Rails ( https://www.edx.org/professional-certificate/agile-developme... ) - Great introduction to web development and software engineering principles
I've also been reading some technical books. Would definitely recommend
Modern Operating Systems - Tanenbaum Designing Data-Intensive Applications - Kleppmann
Although it's not directly related to webdev, I highly, highly recommend the Coursera course Learning How to Learn as a starting point: https://www.coursera.org/learn/learning-how-to-learn
For the computer side of things, I highly recommend Harvard's CS50, which is completely free, for an introduction to computer science . It has a great subreddit  and is a fantastic resource. MIT also offers a great pair of free introductory classes on edx. 
There are so many variables and so much luck involved that there is no guaranteed path, but these are two great resources to get started. These were some of the resources I used to transition from no-CS (disclaimer: with a physics degree but zero programming experience) to a programming job at a startup. I've since continued learning through online and in-person classes and joined a large tech company.
Happy to answer any questions about these resources. Given how many variables there are, I hesitate to use my own experience as an example, but I'm happy to give back and pass on any knowledge I can.
CS50, Harvard's introductory CS class, introduces students to programming with C. I took the online version in 2016, and I greatly enjoyed the way it was presented. I'm not in the best position to compare and contrast teaching methods, as I've only taken the single class on C, but if you have the time I would highly recommend seeing how they do it.
You can access their lectures, notes, problem sets, slides, and other material for free on their course website  and on edX . A warning in advance before you click the course website link though! It's currently Halloween, and the page features an autoplaying scream sound. You've been warned!
CS50x (Introduction to Programming) : Very well structured. Excellent and very Enthusiastic Teacher & staffs. It was the most fun MOOC I took
Learning How to learn : Life changing. I wish I did it sooner.
ops-class (Operating Systems) : This is by far the toughest MOOC I've taken. The Assignments are really tough. Although not impossible. Just the right amount of tough, I guess. I'm currently in the last few weeks and I've really enjoyed it every bit so far.
Interesting (Not Yet Completed): Introduction to Quantum Physics (2013) : My god, I just love the teacher's enthusiasm. After few lectures, I realised I need to first brush up on classical physics before moving further (which obviously was the requirement that I ignored).
There is a good, free book on Python that teaches practical skills for automating tasks. I sometimes recommend it to people, because it's immediately practical.
After that, you could try Flask or Django (Python web frameworks) and gradually introduce HTML, CSS, and JS.
There are also a couple of online courses that might be useful. I've only watched part of the first one -- it was good.
I recommend cs50x: https://www.edx.org/course/introduction-computer-science-har...
Top notch quality free course
CS50 , if you're just getting started. It's Harvard's entry course to Computer Science, free, and covers most of the knowledge a beginner needs to get started.
There's a really great course from Harvard called CS50. This course teaches C with training wheels on so to speak and later removes them. Would highly recommend taking it. It's also free!
This is CS50!
I am currently Learning How to Learn: https://www.coursera.org/learn/learning-how-to-learn/
I can personally recommend:
1. Structure and Interpretation of Computer Programs, taught by Hal Abelson and Gerald Jay Sussman: http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-001-structure-and-interpretation-of-computer-programs-spring-2005/video-lectures/
2. CS50 Introduction to Computer Science, taught by David Malan: https://www.edx.org/course/introduction-computer-science-harvardx-cs50x
Harvard offers a free web course that teaches basic concepts and helps start the process of learning to code.
Check out this class https://www.edx.org/course/introduction-computer-science-har... . It might be below your skill level, but if it's not go through it. It's very interactive and you'll enjoy learning the course material.