If the lower limbs are disabled and there is no problem with the upper arms and hands, you can generally use your hands to exert force, as long as you don't exert yourself. Such as telephone operator, telephone customer, cashier, accountant, handicraft production, engraving, jade carving, general string playing, shoeshine, shoe repair, mobile phone watch maintenance, etc. There are many jobs suitable for them.
If the upper limbs are disabled and the lower limbs are fine, then there are fewer jobs suitable for him. For example, you can be an auxiliary police officer to supervise people who violate traffic regulations. It can also help primary school students cross the road safely and so on.