True on a longarm that we always adjust bobbin tension first, but OP is asking about quilting on a domestic machine, in which case most recommend adjusting top tension first and only touching bobbin tension if absolutely necessary.
Also as a note, many domestic sewing machine manufacturers offer a "low tension" bobbin case as an accessory that works well for embroidery and FMQ.
I have adjusted my bobbin tension for special purposes on a domestic machine too. You just have to be careful to mark the original screw position and to take it easy. But if you are trying to quilt with a heavy thread in the bobbin, it sometimes has to be done.