couple of questions

how old was your lo when they started sitting on their own?
he's 5 months and im not sure if he's ment to be or not

is they anything i can do to help teach my boy to sit on his own?
he'll sit proped up on a v pillow in the corner of the sofa but he will just lean back.

I hold ds around the waist in a sitting position so he can get better head control. Ive heard that bumbo chairs are good but ive never used one before

It depends on the baby. My lo is just now starting to sit up at 8months.