autistic kids and babies?

serinity โ€ข ๐Ÿ‘ง๐Ÿผ๐Ÿ‘ถ๐Ÿป๐Ÿ‘ฉ๐Ÿปโ€๐Ÿฆณ๐Ÿ‘ฑ๐Ÿผโ€โ™‚๏ธ๐Ÿฑ๐Ÿถ๐Ÿถ

so i have a little brother who will be 2 1/2 when my baby comes and we are very concerned about how he will act. he is high functioning but he hits bites screams and headbuts us. as well as dosent talk and we cannot discipline him due to the fect he dosent understand others feelings. does anyone have any posotivity of "it will go well" i really could use some pointers