Delayed milestones & Rotating of wrist

Hi mummies out there, i am extremely worried and concern about my baby’s growth. He is currently almost 15 months old. Unable to walk on his own but can stand and walk with support. He is also still not waving, clapping & point with his hands. Recently i realised he like to stare at his hands , open & close them and then twist his wrist. Everything i googled scares me greatly. He is quite a smiley and cheerful baby, although i have to admit he does not show much eye contact with other babies and sometimes even to me as well. Are there any parents out there facing similar issue? I am not ready to accept anything from google yet because i still feel that he is a happy baby and not totally like how to internet is describing