You should check out the "Effortless Swimming" "5 day catch challenge", you have a whole bunch of efficiency to gain with some simple tweaks. And breathe every second stroke for your main sets, no point doing every four with a long swim.
First! Damn Brandon, good on you homie. I thought I would FLOAT on over to wish you the greatest experience. I wish I still had a float tank to facilitate and speed up your recuperation.