Same here currently I got stuck doing Data visulazation projects
The projects are designed to be harder. The curriculum only provides introductory material to get you used to the concepts, but doesn’t introduce every concept. For that, you need to seek out documentation and tutorials (the challenge course isn’t a complete tutorial), search other resources such as StackOverflow, and if you’re still stuck on a specific area, ask for advice here or on other fora (such as SO). It’s Read-Search-Ask, something of a mantra here on FCC.
The v7 curriculum will be project-focused, but as far as I know, will still have independent certification projects, and I don’t expect those to get any easier.
Back to 2 hour tutorials then I guess.
Hang in there bud. Best of luck.