I hope you have made choice which career path ( web developer, mobile developer, data scientist etc ) you want to pursue and learning accordingly, instead of learning everything on internet / FCC
I suggest once you finish FCC, start building projects ( more you build more confidence you will get )
I had used frontend mentor for projects building ( on my own without looking at YT videos or others code ), you can check it and other similar once as well.
All the very best.