I really enjoyed this until I got stuck on level 3. I have a bunch of ideas about what the solution might be but I'm not good. Are there any websites with chall

I really enjoyed this until I got stuck on level 3. I have a bunch of ideas about what the solution might be but I'm not good. Are there any websites with challenges similar to this that are more geared towards someone that isn't so great at this sort of thing? A "beginner" at security stuff?