You still have much to learn, so don't worry too much about not having every answer -- that's why you're training. But to point you in the right direction, here's one of my favorite ways to open the guard:
http://groundfighter.com/uploads/videos/Saulo%206.WMV
Pay special attention to the point on how you don't need to be a dick with pointy elbows to open guard.
That one's good from knees, which might work well for you while you're still working on getting a good base. But maybe you're better suited for standing passes where gravity does more of the work, in which case here's a nice simple pass to try:
http://bjj.org/techniques/intheguard/guardpass1/
And maybe this:
http://www.grapplearts.com/Margarida-Guard-Pass.htm
Passing the Guard also contains a lot of defenses and counters to submissions from guard, which goes right in line with the great advice about those above. I'd check out that book if I were you.