If you make it along the coast road as far as Cley-next-the-Sea, Norfolk Wildlife Trust Centre has disabled parking places in the car park, close to the entrance, with electric door opening and a lift to the left as you go in, to take you up to the shop, toilets and cafe, which does good food. It has glass windows running the whole length of the cafe seating area, where you can look out over the vast reed beds of the reserve, towards the sea. This is a good place to see Marsh Harriers flying over the reeds.
The reserve itself is accessible by wheelchairs and mobility scooters along boardwalks to 3 hides. There is a small charge to go onto the reserve (accessible across the road from the lower car park), free to Norfolk Wildlife Trust members. Take binoculars, if you have any.
At the moment there is a fair amount of building work going on with a new education centre, to be built at the back and side of the main centre. but the car park is still in operation, with disabled parking as usual. The Centre opens at 10am each morning.
Closer to the Hunstanton end of the Norfolk coast is the RSPB reserve at Titchwell, which again has wheelchair and mobility scooter access along a good pathway. The December storm surge washed away a boardwalk and viewing area at the very end of the track and is now cordoned off, but the pathway has great views either side, all the way down to the Parinder hide, with plenty of birds to see quite close by. Look out for Bearded Reedlings in the first reedbed on the right as you go down the path.
There is a shop and cafe (try the bacon and cheese baguette - delicious!) If the weather is fine, there are picnic tables outside the cafe. The toilets are on the side of the entrance road.
You don't have to be a birdwatcher to enjoy these two places, but it could be the beginnings of a great new hobby!