Yes, it sounds like an area that needs alot of attention.
In the beginning you may need to do multiple session a day. As the area begins to improve and correct positioning is reinforced and becomes the normal/default positioning it will not need attention so often to remain in a good place.
You’ll begin to notice when an area first gets tight so it will be easier to address earlier on.
Address spine first, then move to the primary these are where you will see the biggest impacts first.
Identify your biggest performance limiters and address those areas first.
Yes, if an area needs attention stay with it.