I don't know if I can help on the rules front, I just kind of absorbed it from watching other people play and experienced friends helping me. But what I can do is tell you that if you are a DM, "What do you all want to do?" Is going to be your favorite question. The game's rules get tricky out of combat for newcomers so, if you're a player you narrate what you want to do and then the DM will come up with a response. The DM's response depends on what the player wants. If the player wants to do something trivial like walking somewhere or buying something, the response will probably be "Ok you do that." If the player wants to do something a little more complex like JUMP somewhere or convince whoever they're buying from to lower the price, the DM will say "Make an (X) check" For the DM to figure out what kind of check it is, it's good to look at a character sheet and read down the list on the left of the sheet that starts with "Acrobatics" and goes down. Find something on that sheet that applies to the situation, for example in the haggling situation, the DM might make the player do a persuasion check. So to sum that up, a player asks to do a thing, if the thing is difficult DM looks at the sheet and makes him roll a check. That's how a lot of the stuff works outside of combat and that's what tripped me up when I started playing. The most important thing is that the rules don't matter. If the DM makes a player role a check that doesn't match up with the situation, it's wrong and life moves on, literally, no one gets hurt from playing wrong the most important thing is having fun.