@MikeP Thanks for sharing your good news about getting ready to start HRT.
The vast majority of HRT regimens include both a T-Blocker (Spriro) and also a doctor preferred variety of Estrogen. Those meds are the basics in HRT.
I am not certain why your therapist and/or doctor offered just you one or the other.... or both.
You and your doctor should be very clear on this and discuss this thoroughly as it relates to your specific medical issues, transition goals and your overall health. No one here can second-guess what your doctor is telling you.
Wishing you well and please keep us updated as you feel comfortable doing.
Danielle