Baby boy

My baby is not walking yet and I’m getting worried he is 13 months old. I know the have til 18 months to walk. But I have been putting him in a walking walker and a bumbo seat since he was like 9 months idk if something wrong my doctor says everything is aligned and okay but idk I’m scared I did something wrong. And tough times are here and I can’t afford stuff that he need you know this is what I got from friends.