I know what you mean, I don't quilt well worth beans. But I keep trying. Make some practice pieces--cut muslin fabric in 12 to 15 or so inch squares and sandwich with some batting (good to do with scrap batting) and just keep practicing. Start slow and just keep it moving. One thing I know for sure a person needs to be relaxed. Put on some good music or story you like and go to it. When you feel yourself getting tense stop and pick it up later.
What does SID mean?