So the guide & thread I found on this website about accessories still leaves me with some questions.
What I do believe I've gleaned, however, is that non-SSR accessories are not worth leveling up and that only SR accessories should be used for enhancing due to the high gem costs.

Is this is the case, how do I gain my first SSR accessory? I'm totally at a loss on how the Accessory points, shop mechanics, and farming works.

I would also assume it is not possible for someone low rank like me to complete the 4th accessory quest (granted I had the materials to even enter in the first place).