Unhealthy anxiety triggered by too many choices is not really caused by the existence of the choices, but by an unhealthy mental reaction towards these choices.

Unhealthy anxiety triggered by too many choices is not really caused by the existence of the choices, but by an unhealthy mental reaction towards these choices. And it won't be fixed by reducing the choices (though the symptoms may be temporarily reduced that way), a fix needs address the underlying condition(s). To put it clearly, I'm not a doctor and I'm definitely not your doctor, but in general "anxiety which is rendering me incapable on some days to make any real progress on my goals" is not a healthy reaction to any number of choices, and "I have found myself in a constant state of ideation" is not a state that should be accepted or adapted to, these things need fixing. Consulting a mental health professional is the proper way to check if there are underlying conditions and if so, what's the best way to treat it - an internet forum can only make some guesses based on incomplete information. If that's not an option for some reason, things like meditation or self-CBT sometimes help some people who have anxiety problems.