The reality is, employers want to know what you can DO, and don't really care what you've learned, or think you've learned.
FCC is focused, through a long series of projects, on giving you a platform in which you can practice "doing" and build up evidence to support your claims to any potential employers. I just looked at your FCC profile and you are just about to get to the "doing part". Once you finish the jQuery section you just hit, you'll be at the first of the actual front-end development projects. The projects there, and later in the course, is where the bulk of your time, and effort, will (and should) be spent ... they are where you get to prove that you didn't just learn HTML, CSS, whatever, you understand them to the point where you can use them effectively to build something "to specification".
Don't think of FCC as a platform where "once I check off enough boxes, I can get a job".
Do the curriculum. Build the projects. When you learn more, revisit your projects and improve them based on your new knowledge. The projects will become the springboard of your "proof" to potential employers - don't leave them at the "I was able to throw this together with my novice HTML skills and am really proud of it" level. Keep working the curriculum and revising the projects to the point that they're at the "wow, that work is as good as anyone we've already got on the team, that's really slick how they did that" level.