Run the GW at 20mg per day when you are ready to start but get started on the diet adjustments now! You will make so much progress just by doing that between now and Spring/Summer.
Love an empty gym but no way am I training that late, lol. Glad to see you using the elimination method for the anxiety. It is the best way to figure out what could be causing/contributing to it.
I like the 1st option, but keep it to 12 weeks. No need to go longer. The esters are so long, people forget you are actually "on" much longer than when you do your last pin.