Child developmental issue. Be autistic?

My 13 month old baby not started mimicking us not follow gesture like wave , clap and not understanding simple instruction like come , give me. Not started speeking he does some babbaling he says mamma but not specific parent whenever he want he says this but not for whole day.he rarely respoded to his name  but when i call from another room he ll come to me not everytime. His hearing test done that ws fine too. When i talk to him i feel he is not interested but i sing rhyme or song he does listen and make eye contact....some positive thing he does  like hifi if i raise my hand to see this he raise his hand too. He loves to play peek a boo and pass smiles to others and when i smile he give back smile if he see me. He is very happy to others kid but known not for randome kid. I google his symptoms They show about autism . His erly intrvention done they found lot of concern but not so prompt red flag and said wait till 18 month . Can my child ll  be autistic ?