New cockatiel problems

Hi, yesterday about 20 hours ago i bought a 2 months old high chance of being a male fully weaned normal grey cockatiel,his name is Luka,he hasnt been eating nor drinking nor sleeping since. I dont know what to do😞 he has sunflower seeds and millet like seeds and he didnt eat any. Iam thinking of giving him green peas sprouts but im not sure if he is supposed to eat that in this age im getting really worried about him. I guess he isnt comfortable.he also didnt make a sound and barely moves. Please help me (p.s im new here)