..And I can't find anything relevant.. Like how should a general JS skeleton look like? Are there any good libraries to use? How can I import maps made in Tiled to a canvas-based game?

I know it's a lot of questions and little detail but JS/HTML5 in general confuses me as of now so I'd like some clarification if possible please.

Thank you!

I found plenty of tutorials with a quick Google search...

http://michalbe.blogspot.com/2010/09/simple-game-with-html5-canvas-part-1.html
http://net.tutsplus.com/tutorials/html-css-techniques/build-your-first-game-with-html5/
http://jacebook.co.uk/blog/2010/09/11/html5-writing-a-game/