How long until he intends to retire?
You need to look at pension sharing first, and then work out what you need to live on until the time that the pension sharing kicks in.
You have been a low earner for a long time, presumable doing all the stuff at home that allowed him to have career and earnings, and with his agreement at the time.
You now have a potentially highly limiting condition which will both make it nigh on impossible to secure a different job, or to keep it (time of for medical appointments, possible periods of incapacitation during active treatment). In short (and sorry to be blunt) you don't have good earning potential or realistic chance of moving towards it in the medium term.
I like the sound of your solicitor - these are the sort of circimstances where SM is likely to be awarded.
He's bound to kick off with the insults - he was happy enough for you to have this pattern of employment when it suited him, but he doesn't like the look of it when it comes to assessing needs and capabilities.
As you are stable at present and capable of your current level of work, you will be expected to continue working. But it sounds like you have a good case that you cannot do more, even though that would be expected of younger women in normal health on divorce.