Am I just paranoid?

So the other day my cousin bought me the Baby K'Tan off my registry. I was very excited to use it and have the freedom of mobility. So I read and watched the instructions several times and then gave it a go. Maybe I'm just overanalyzing and paranoid but I keep worrying my baby is being crunched against my chest and can't breathe well. He'll squeak out a little cry once in awhile and look unhappy but then he falls asleep. I keep him in the Hug position because he's pretty big for a 1 month old (24in long and 12lbs). The whole upright position with a newborn freaks me out. His back is pretty strong (he's already able to lift onto his forearms and lift his legs during tummy time!) but still I worry his back gets crooked while upright. Anyone have the Baby K'Tan that can offer some advice?