Rebalancing his body

[u/Accurate-Data-7919]

My pup had ivdd and was paralyzed earlier this year in January and has been in recovery since with no surgery began to walk again etc but we’re still having issues with how much pressure he puts on his front paws. He now positions his front paws kinda towards the middle of his body in order to overcompensate for his once limp hing legs. But how do you teach them to trust and to strengthen hind legs and reposition his standing. Also his sitting he sits with his hind legs straight going through his front legs. Instead of knee bending to sit. Any advice?