DLA mobility

Hi. My child will be 3 in Decemeber. I hav e received the DLA mobility form to fill in. He started walking 3 months ago. He is still very unsteady but getting better. Some days when he walks a lot the next day he is wiped out and reverts back to crawling. He still cannot get to a stand without using furniture to pull up. He is hyoermobile with low muscle tone. He struggles with steps, even one is hard for him and still crawls up. Also sometimes he will refuse to walk if he fears a new place or situation. He has no sense of danger. He has a chromosome disorder sensory needs and possible autism. He is non verbal. Any advice on filling the form would be great or just to hear others experiences. Thanks Michelle