"Hello, I am a student doing a project on the topic of Arduino, and I ask for a link for interesting Arduino websites that would be helpful, or just straight-up information. The information that I would suggest sending is information about Arduino, rather than the coding part of it. Thank you!"
Are you willing to pay money for this information? The reason I ask is because the forum section you posted to "Gigs and Collaborations" is used to offer paid work. If you're not willing to pay, then this is the wrong forum section.
Let's start with www.arduino.cc
But the most arduino info I usually find on www.google.com That one really should be on the top of your list.