When I think of all the people I know with Cerebral Palsy (CP), saying your have CP gives me very little ideal of how good your coordination is.
Do you live independently?
Can you pick up and drink from a normal mug?
Can you do up buttons?
Do you use a normal computer keyboard and mouse?
How are you coping with using a BG meter or do you have a freestyle libre?
I expect that having Cerebral Palsy you may qualify for a pump based on practicality, however I expect you will find it very hard to refill a pump yourself. Different pumps can go for different length of time before they need attention, but any pump can get issues without warning.
I expect there is a consultant somewhere in the NHS who has the experience you need, maybe try contacting
https://mobile.twitter.com/parthaskar as he is a national lead consultant for type1 and loves using technology to improve people life. I assume you have already asked SCOPE what surport they can provide.