Hello. I Have A 9 Day Old Baby @ Home

Hello. I have a 9 day old baby @ home and have a couple questions. 1 he sometimes stiffens his legs , where they lock and cant be moved. Not for long and he moves them normally most the time , should I be worried. 2 he sometimes makes sniffling/ grunting noises right after breastfeeding should i be worried? And 2 i read that he should engage if i kiss or snuggle his nose with mine but he turns away , should i be worried again ??? Thank .