Help

I entered a half Ironman for oct 13 need a few more things looking for a wetsuit I’m 5”9 140lbs
Need shoes got speed play pedals and no shoes size 10 also I’m a single bk amputee so I think this could be crucial
Riding shorts and jersey probably small?
I’ve never tried any of these on so I’m not sure about what size I need
Just trying to tri