I am not a doctor...just giving my opinion. Hopefully your doctor knows your scenario better than me. Try to determine a protocol with your doc that you can stick with for at least 6 weeks.
High shbg historically means less shots per week however several high shbg guys here are on 2, 3 or eod protocols.
For arimidex dosing you can try to dissolve in vodka then measure dosing with a syringe. Some people here do it that way.