My first board after a standard costco wavestorm at 8'0" was a mini performance longboard, 8'2", 22", 2 7/8", 57L. I am 5'10", 150 lbs, male, 34, surf in heavier surf in Northern California. This was a huge step forward in performance, both in staying on my feet in more challenging conditions, and responsiveness in turns. A female friend, similar size and weight to you, picked up one with the same dimensions as mine and found it too challenging to paddle at first.
Going from the wavestorm to any hard board will be a big step in performance. Something in the 8 foot range, with plenty of width for stability (22" or more) is a good idea. If you are fit and a strong paddler, you could select something in the 8 foot and 51L range. This is about the weight to volume ratio that I went to going off the wavestorm. If you want a little more paddle help, you could get something a little fuller in the 60L range. Getting to 70L plus puts you firmly in the longboard range of volume, which could be a good thing also. It is worth considering the waves you will surf -- if you are going to longboarding-type waves regularly and aspire to that style of surfing, then you might want to get a 9 or so foot longboard, which comes with that much more paddle power and stability.
There's a nice article on volumes and board sizing here:
https://surfsimply.com/surf-coaching/vo ... s-updated/Note also that many online board recommendation systems and volume calculators will suggest you go way way too small for beginners or average surfers (hayden shapes for example). I'm not clear why, as most people who are not yet very, very good surfers (regularly linking turns top to bottom, doing snaps, etc) benefit from going larger. The reason for going short is usually to make quick turns, so this advice seems to be for people already good enough to do off the lips and other such moves regularly.
Good luck!