Dylan has a video "Am I ready for Steroids?". See the link below. It shows everything you need to know and answer all the questions you have. Make sure you watch the video from start to finish...
As Dylan mentioned before, 150 test C a week. You can split dose for two pins a week and keep levels more stable. Aro 12.5mg every three days sounds good to get started. get blood through www.privatemedlabs.com to monitor a dial in dose of test and AI.
You get the test for sure. You can always compare and monitor progress. I would wait a few weeks until Aromasin gets your estro under control and get tested. That way you can adjust test/Aro doses as needed.
What did you do for YOUR PCT?
Your FHS levels are in range and still test is low, so that's an indication of possible low test condition.
I would try a full PCT from SARMSX first and get bloodwork after. If test levels are still low, then TRT would be a viable option.