welcome & have fun.
some tips: buy bitcoins - ignore altcoins, they're mostly shit and not worth your time. don't gamble (mentioned before), do not trust anyone and always use escrow.
As a newbie I have to ask- how to get -5 trust with activity=14? Or... how to not get it?! Anyone can just click "don't trust" and you're scammy?
I think that is a little bit how it works, you just have to hope that nobody does that