Thank you, Notsewgood! :D
Many Craft Person, yes I wash after I get a quilt done. I'm too lazy to pre-wash. lol!!! Others on here wash first. I believe it's a matter of personal preference. Some have had fabric shrink, colors run, etc, so they pre-wash. I've been lucky so far, and haven't had any problems from not pre-washing. If you have some iffy fabric though, you might want to be safe and wash it first. You can put it in the 'search' above and probably come up with a lot of posts on it, for more opinions, info!
SID is Stitch In the Ditch (or down your seam lines), and FMQ is Free Motion Quilting (dropping your feed dogs, and using a darning foot to do your own thing).
And no, you are far from being dumb!! I didn't know what they meant either before!!
:-)