First time travelling with multiple issues.. cancer... das help please

[shrek1609]

Morning fellow dibbers,
So after the year from hell I have been given permission to fly (after much arguing) and we are going to be able to fly out in September for my birthday.
I spent 3 months in hospital last summer, had 3 lifesaving operations and spent much time on life support in ICU.
I have Ovarian cancer, a colostomy, am on chemotherapy and have mobility issues as a consequence (higher level pip and a mobility badge).
We have been to florida quite a few times but obviously never with me like this.
My friend is over there in her villa in September, and what I want more than anything is some sunshine and to feel like I can do "normal" things.
I know I will have to pace myself.

We are having a week at HRH which will obviously allow us to utilise Universal Express Pass (except for Hagrids new ride... any ideas if Universal have something like DAS?)

We are also doing a week offsite and visiting disney... now someone said I will be entitled to utilise DAS... can someone please give me a brief overview of what this is and how it works in principal?

Ive tried reading a few posts but you all seem to understand the basics and talk quickly goes over my head.

Please bear in mind I have chemo brain (it really is a thing) and it needs to be very basic for it to go in.

Many thanks in advance for any help

(ooh I have read about getting a red mobility badge and am in the process of doing that for parking)