I used to think I would be the mother to motivate baby to reach milestones early... reality is different

Am so busy taking care of baby and maintaining balance in life that I don't do much to get baby trained. He can lift his head alright but that is not because I gave tummy time, but because he loved the chest and wanted to see so he gave it to himself. Haven't seen him role over. He has turned head from right to left when I once tried tummy time. Honestly when I get to it once in a blue moon, we just do 3 minutes.lol. if he ever learns how to sit, it will be because I carry him in my carrier as I run errands. How much can your babies do? How much is my 2months (9 weeks) old supposed to be able to do? And nope, I don't feel like am a bad mom at all.