I just donated yesterday. Maybe my experience can help.
I went off cycle 14 weeks ago and went directly on TRT at 100 mg/w. 2 weeks ago I had blood work done and by hematocrit was 53 with hemoglobin at 18.7. So I was running thick still even after 12 weeks off. Yesterday at 14 weeks on just TRT I was still at 18.7 hemoglobin. After giving my pint I am at 49.0 according to calculation. Here is a website to do the calculation for guys that donate and if you juice this is handy to keep things from getting thick.
https://www.thecalculator.co/health/Allowable-Blood-Loss-(ABL)-Calculator-1066.html
Usually after I donate like this a few days later I feel I have more energy. According to blood work my LDL and triglycerides are still a tad high as well. HDL was good. So the plan here is to stay off/on TRT for another 8 weeks or so, up the cardio, tighten the diet and retest every 4 weeks and then re-evaluate after 8 week.
IMHO this is the smart way to do things for guys that use PEDs over 40 year of age, probably for all PED users really but definitely for those over 40. I juiced January and February and then from May through August so probably a little too much the past year, which is probably why my lipids are skewed. Now I have to wait longer and have my bloods pristine for at least 2-3 months to clean things up inside before messing with AAS again.
I'm probably one of the oldest guys on this board and still alive, at least for now. BTW, at least for me, I can hold a good amount of mass on TRT so don't let TRT scare you. Once you get back on you will be ready to go, feeling healthy and the body will response much better.