I don’t know of a good list of Jekyll tutorials that would be appropriate for any skill level. Here are 30 or so articles that helped me out along the way: https://pinboard.in/u:opattison/t:jekyll/t:howto (may be out of date – I first started bookmarking them over three years ago). Viewing source on Jekyll sites was invaluable as well – star every site you like on GitHub and dig in.

If you’re looking for help with something in particular, let me know. How to approach solving a problem in Jekyll depends on what your goal is. Most problems in Jekyll can be solved with either a foundation in Liquid (the templating language), some Ruby and project configuration, or a decent understanding of HTML, CSS and JavaScript, and pretty much everything can be solved with a combination of those disciplines. Let me know where you’re starting from and what you’re trying to do and I may be able to point you in the right direction.