The site is set up with many courses that are meant to be a step-by-step process so you can measure your progress. Guitar Fundamentals is set-up specifically to prepare you for the rest of the courses on Guitar Tricks. Take those lessons in a step by step fashion and don't move on to the next lesson until you have the previous lesson down. All too often students want to jump from lesson to lesson; which is OK in most cases, but if you want to measure your progress and refrain from laying dormant in your playing, take it step by step.
If you have yet to do so, go through Guitar Fundamentals 1 and 2 and take each lesson at a time, not moving on to the next lesson until you understand the lesson you just did. As always, use the forum and Christopher to answer whatever questions you have before you move forward.
Douglas Showalter