UC50: 'about your health condition' - how long?

Many thanks in advaice for reading. Are there any examples of answers to this initial question about your conditions, on mental health grounds? I have read the benefits and work UC/ESA guides for mental health conditions thoroughly and consulted other advice and have typed up draft answers to all the questions. I'm not confident about how succinct I should be in the intial explanation of my conditions.

I have complex mental health conditions that affect my mood and functioning very variably & the road to my various diagnoses has been long. I'm trying not to write a life story but it's hard to keep it succinct. I always struggle to keep anything less than a page and a half of typed A4, not including things I might move to 'additional information'. Should I do my best to edit it down or is it okay for it to be very long?
I'm also worried it sounds like I am exaggerating so would be viewed less sympathetically, though I am doing my best to be honest and straightforward.
warning: mention of self harm
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I'm concerned about how to phrase that I would be at risk of harming myself if i was expected to do activities (I can never predict if or when I might be able to do something for a long list or reasons) in case it sounds like a manipulative threat. I have EUPD which puts me at a high risk of suicide and this is supported in the NICE guidelines. I also have ADHD and generalised anxiety disorder.

Maybe I could write up a symptom diary and attach that in lieu of some of the attempts to explain. It's hard to understand myself and I often forget or dont even notice that other people don't find things hard the way I do.