Here's some noob advice for you-  The absolute #1 most important thing is to tell people you are new and learning.  I can't stress this enough.  Most folks will gladly explain mechanics to you if you ask.  But if you say nothing,t hen they assume that you know what you're doing and get PISSED when you zig while they're zagging.

Second, as you work your way through T1's, you'll get a ton of +1 AR infusions.  Save those and convert them to +9's as you go.  +9 is the most commonly used AR infusion and it's a currency of its own in a way.