You could put something like thermal tights under it and pair it with a cute puffer or coat, maybe a matching hat or scarf? Idk, I'm just thinking of what could work without being too uncomfortable.
That bodysuit is fire. Keep it. A shacket or cardigan with it and some Nike socks or lulu socks w sneakers . Can I ask what size bodysuit you got . I want this one also but not sure what size to get. A 6 is my usual.