I got started on Breaking Bad forum, you can sell drugs there.
I think selling over the darknet is way better and more secure than in real life.
You can't make sure employees don't decieve, but lower the risk by not letting them know to much, chose people you trust, keep the number low
Prices depend on location, you might find something interesting on the internet, or look at the prices of other dealers from your ares (in the darknet)
Profit can vary, and I mean vary from a few hundred a year too millions (although rather unlikely). Depends on how much you sell, which scales, on whether you sell small scale on the street or bulk to the people then selling on the street, as well as which drug and which area.
Everyone has to chose for themself whether the money is worth the risk, I personally say yes.
Use crypto, store your money on different banks (if even doing so what I wouldn't recommend at all, just use crypto). Don't appear rich for no reason.
Store drugs in different locations, if they only find a part of them and trace it back to you you will only get accused for this part.