Let me know if you find one :]

It's very much not dissociation

stoics have a concept of preferred indifferents which are things like life, health, a good income/wealth, social status, etc that you'd rather have than their opposites, like death, sickness, poverty, bad reputation, etc. From that not sure one could label stocism as a form of dissociation.

Well you can try whichever philosophy that resonates with you, I said Stoicism because is the one that focused more on how to stop anxiety, but in reality all you need to do is focus on the trully important things, wich is the final purpose of any philosophy