No harm looking now but problem is looking for cars now and will they still be here when ordering time comes. It happen to myself, waited to 3 months before renew date then the car I had my mind set on for the previous 6 months came off Motability less than a week before I could order.
Had to wait another 3 months until something suitable for myself came up again, got my order in and the car got withdrawn again a few weeks later so if you see it, order it quickly.
I would extend your current car regardless but you can’t do that until the 3 months before renew has been reach.