how is this workout?

Hello, I swam before and was licenced swimmer and now i started again. I am 36 years old, 180cm and 80kg, My primary goal is weightloss and being fit (burn fat and shape muscles like typical official swimmers) so how is this workout? I train 5 times a week. 100m freestyle warmup (%25 speed) 200m freestyle (%50 speed) 4x200m medley (%75 speed) (50m butterfly, 50m backstroke, 50m breaststroke, 50m freestyle) 100m butterfly (%75 speed) 100m backstroke (%75 speed) 100m breaststroke (%75 speed) 100m freestyle (%75 speed) 2x50m freestyle (%100 speed) 1-2min rest of each break, total 1600m. Thanks!