I think you need to start from scratch.
Jacket is FAR too short.Eyballing and guessing, 3cm+ needed.
Sleeves are FAR too narrow, up and down.
You see where the top button is located? That is going to be far too high when jacket is lengthened if still a 2 button.
You are a big hombre, naturally. Go with it. Perhaps you are not at fighting weight but it is not as if you are just grossly overweight or with some big belly.
Big and powerful is good as long as you...