Brand new to the game, I have a few questions that I can't find an answer (or a clear answer) to in any FAQ.

So I am on a free trial for 7 days and I just started the game. I am only level 14 right now. I am playing a wizard.

First, and most importantly, how the hell do I bind attacks to hot keys? I have a logitec G600 (the ones with all the buttons on the side) and I just want my fireballs and my lightning bolts and all that to be on my hot keys.

Second, I was in a town, trying to find a place to sell items and free up inventory, and I went to an NPC who said he buys/sells. Well it said I had to activate a node in order to use him. I am not entirely sure what that even means.

Next, the pearl shop is extremely confusing. I want new robes. I look like a crawled out of a dumpster. I'd also like to buy an upgraded staff. Not sure yet if this game allows wizards to wear armor, but if so, I guess I'd like some of that too. Thing is, I dont see anything like that in the shop. So can I just convert real money to in-game currency so I can buy it from a shop or on the market?

Last, my ultimate goal here is RP. I will quest with friends when they irritate me to the point that I wanna do that, but what I'd really like to do is open some kind of business (preferably dealing in magic items, but I'm open really) and have a very RP based experience, as apposed to a combat based experience. How can I do that? Right now the game just seems to be sending me on quest after quest after quest. Does that part end at a certain point where I can kinda relax and chill out?

Thank you all in advance for your help.