You kinda aren’t supposed to solve challenges immediately just coding on the fly. It’s advised to search and ask questions if you don’t understand something. And it really makes FCC an excellent teaching resource. Read suggested mdn articles, then google, ask questions. Read books (You dont know JS is a good choice), do courses at codecademy or elsewhere, watch some youtube tutorials. You shouldn’t limit yourself only to information, explained at FCC (and yeah, it’s explained pretty briefly, you’ll need more theory to move on).