@lilyathena That's quite a list. Try breaking it down and making decisions from your rational mind rather than your subconscious.
Single parenting where I shoulder 99% of the responsibility.
Is this through necessity or preference? What would happen if someone else offered to share the burden?
A desire for high standards.
Do high standards bring happiness? What are 'low' or 'acceptable' standards mean to you?
Being a high achiever academically.
Again, does this achieve happiness? Who in your life has/is dictating academic success as being desirable?
Being too precise and wanting to sort everything out if it's 'not right'.
Ever seen a happy perfectionist? Ever seen a candy stripped unicorn? Both are equally rare.
Worrying about my DC's future, particularly education.
On the surface that seems reasonable; education = options. But worrying gets you absolutely nowhere without actual action. Teaching them to cook, to do DIY, to travel, etc also adds to their options.
And, post-pandemic, a discomfort that so much is just 'not working properly' in terms of social systems that used to support well eg GPs
Again, worrying about stuff that is outside of your control is a waste of time and energy. Unless you have the time and drive to be part of the system (local council or political party) what value does worrying bring to your life?