Sometimes I think people are just being too overdramatic over it or maybe not LOL
What's in it anyway if you ever did access it already
The Dark Web is likely the thing you're talking about. The kind of "Hidden Internet" that you need specific software (Like TOR) to access. To tell you the truth, it's pretty over hyped. Sure it can be dangerous as completely unmoderated stuff tends to be. But if you're smart (I.E Don't go browsing it on your main OS. Use something that TAILS OS that's built around keeping you anonymous and safe. Don't download stuff from there and DON'T try to buy anything. It's likely a scam or a honey pot. and don't go creating accounts on websites.) you'll be safe.
Generally it's mostly just Fake Services (Fake Hitmen, Fake Drug sellers, Fake Red Rooms. Basically, people trying to scam the gullible), Honey Pots (Like the previous one. But set up by Govts to bust people trying to do illicit stuff) and weird art projects. AFAIK You're not going to be finding any legitimate deepweb services unless you're already in the know. Except for Red Rooms. They straight up just don't exist due due to the limitations of TOR.
Though, I wouldn't advise you to go looking into it if you're not all that tech savvy. Instead, there's a YouTube series by SomeOrdinaryGamers where he goes through it and finds all kinds of weird stuff and explains it all. So you don't have to risk anything. Dude's smart enough to take all the precautions to not get himself in any trouble.
Here's a random episode of it. Good watch.