W3 Schools has been an excellent resource for html and css whenever I have gotten stuck on a particular issue or concept. Their quizzes have also helped me get a grasp as to where I am strong and where I need to focus on improving.
What happens when a group of homeschooled kids get together and create a youtube channel? You get Blimey Cow. They have a knack for poking fun at pop culture in the most entertaining of ways. Check them out!
Skillshare has become one of my favorite resources. For about the cost of a netflix account, you can learn a myriad of different skills, ranging from coding(which is what I am focused on), to photography, drawing, and a whole lot more.