^^ That. The one and only and the best read a newcomer can get around here
Dos and don'ts? Well, that's kind of easy.
There is one Don't: Don't give up! and one Do: Do whatever you want and can.
Exactly. Space is big. And is clearly designed for getting lost in it.
The only thing that matters, here, is to have fun. Well, and money... >.<
If you want to know where the levers are and how to use them. (trade, combat, ship config for example) Take a look at some of the tools and advice that has been assembled in the swarm of wikis and fan sites. They're amazing.
After all, it's a bum feeling when you find out that your $25k profit is a joke because there was a rare item you could have traded just another jump along the line.
Welcome,
Be prepared to loose many hours lost in space, more than you'll ever realise!
Have fun.
Regards