ESA telephone assessment-Parkinsons

Hi everyone
I have early onset Parkinson’s disease and was diagnosed about eight years ago. I’m currently not working having handed my notice in 11 months ago because I was slowing down at work. I am now trying to claim ESA. Due to Parkinson’s being progressive with no cure I thought I might go into the severe conditions category as I do seem to tick the criteria but would this be considered after the tel assessment?
So I sent in a detailed ESA 50 form with a lot of supporting evidence (from consultants my nurse and discharge letters from the physiotherapist and neuro psychologist that I saw in the last 5-12 months) and was hoping that I might have a paper based assessment. I contacted Serco again today who confirmed I am going to have a telephone assessment which they booked in for me in a week or so.
Just wondering, what kind of questions might be asked - will they just go through my ESA 50 form and confirm my answers? My symptoms vary a lot depending on if my medication is working, if I’m having an on or off period. I also suffer with anxiety and can get a bit flustered on the phone and I’m worried I’m gonna mess up on the call and not be able to explain my condition and the way it can affect me. I was hoping to have some info from you in the following if possible please…..
Any advice on how best to prepare and tips for the telephone interview…
Is there a copy of questions that I can expect they’ll throw at me so I can prepare..
Anyone else with Parkinson’s been through this successfully- hints and tips..
How long after the assessment can I expect an answer?
Thanks 🙏

Thanks for your reply. Yes I have had a look through as much as I can! My condition does in fact play a key part in everything I can / want to / and am able to do daily. For example I have a dog but we have a dog walker now to help 3 times a week and I can only walk her at certain times depending on when I have taken my medication as when I am fully dosed I get side effects which makes it impossible to walk if dyskinesia kicks in. The difficult thing is when I am having a good day things can be great but when my meds don't hit the spot things can be quite debilitating so symptoms and capabilities vary greatly. I was told to focus on the worse days. I spoke to someone at Parkinsons UK about my claim and they gave me some initial information - I have contacted them again as they may be able to get someone to be on the call with me. I am hoping this may be helpful. Do you know roughly how long Serco take to get back to DWP and how long decisions are currently taking?