Only real advice is to make sure you keep hold of that letter as you will need it, apply for a Blue badge if you haven’t already got one.
Regarding the car, well you obviously need to assess your daughter’s needs over the next 3 year, is she still growing, wheelchairs etc, then the needs of the rest of the family. Once you have an approximate idea of what you need, you can look on the Motability website to see what cars are on offer. Then it’s drawing up a shortlist of cars to try. Test drives and ordering, the Dealer should assist there, and you have to order from a Motability approved dealership. Good luck
Previous Motability Cars
2006 - 2009 Skoda Superb VR6 2.0tdi
2009 - 2012 Citroen C5 2.0tdi VTR Nav
2012 - 2015 Nissan Qashqai 1.5dci tekna
2015 - 2018 Ford Kuga 2.0tdi Titanium X
2018 - 2021 BMW 220d X drive 2 Series Active Luxury
2021 - 2023 Hyundai Kona Electric Premium SE
2023 - Hyundai Kona Electric Ultimate