Any tips to stay safe while gringo getting coke in Brazil for the first time?

I heard that the food vendors may actually sell coke from their food stands. Which sounds like a somewhat safer option compared to some rando. The other option would be an "airplane" that goes into the favella to pick it up for you. In general these should be safer than Randoms right?

From what i have seen, it looks like 4/5 people in a nightclub will be doing coke. I'm not sure how safe the nightclubs are though, and general travel at night seems rough. Just always take an Uber everywhere.

I'm sure it's not very safe to follow a "dealer" into a dark alley..

From what I understand small amounts of cocaine for personal use are legal there. Feel free to correct me if I am wrong.

Any other tips or tricks would be much appreciated, ty!

It doesn't sound like the coke in Brazil could have fentanyl in it like American coke does right? I think that happens in Mexico/us.