Baby wearing for 3mo

Hi mummies, my son at 3mo is already almost 8kg. So far we have been carrying him in our arms and only recently tried to baby wear him. However our attempts in using ring sling has failed as he is quite tall and straightens out his legs in the sling. We also tried using carrier but he is still not able to sit up on his own... Would appreciate sharing how you baby wear during this transitional phase.. tia :)