Oh, Sorry, I tried to determine from your post where you were in the process...
So you are machine quilting and wondering about starting and stopping?
First, I dont bring the bobbin thread to the top,,,
There are a couple of techniques that I have seen..
1. when you start, shorten your stitch length to a very very small, almost no length for a couple of stitches,, and the same when you end...
2.. This is what I do, my machine has a start and stop stitch, but this is what it does...Stitch in place for a couple of stitches, then change to your quilting stitch length, at the end, stop and stitch in place a few stitches.
Now, I am assuming that you are stitching on your sewing machine, and not a long arm...If you are using a long arm,, I am not the one to help you... but if you make that clear, we have several professional long arm quilters that Im sure will help you..
Hope this helps...