i was under the impression that agora etc were all dangerous phishing sites...
is there an updated list of 'safe' dark marketplaces?
There are lots of articles on clearnet, look around

But ordering substances that are forbidden in your contry is illegal.
Make sure to use Tor while searching for clearnet articles about the deepweb. Don't be low-hanging fruit and Google crap like that without Tor - it's the perfect excuse for a raid which will waste law enforcement's time. Search around Reddit. Acquire knowledge and do what you want with it
within your country's laws - the government always knows best and is just there to protect you.
It is not at all illegal to read about sites like SR or other illegal websites. There are a lot of legit reasons to read about and even access these illegal darkweb sites.
To say that you should not read about sites like SR is like saying that you should not read about a murder in your community or about a bank robbery. Reading about any of these would not implicate you in anything illegal