Originally Posted by: SalvaX

I noticed that Justin Guitar (which offer all free lessons) has a similar feature. Classes are organized by levels of difficulty (show as colors --https://www.justinguitar.com/site-map-and-lesson-structure) and each song is related to a specific color (https://www.justinguitar.com/songs).

Not rocket science but so useful...

Is the problem that you are having trouble gauging difficulty levels? We do offer difficulty ratings, and instructor Christopher even has an entire blog post explaining what they mean here: https://www.guitartricks.com/blog/Difficulty-Ratings-Explained

Also, in the Songs page, you can always sort by difficulty as well.