As Finn said 100% get pre-cycle bloodwork. Also you need to get week 5-6 bloodwork done mid cycle to see where your estrogen levels are (as well as make sure your test is good).
You 100% cannot run 500mg/week of test without an AI like aromasin. You need the bloodwork done pre cycle to see where your natural test, estrogen, LH, FSH, etc levels are so you can compare them to after your PCT. You need the mid cycle bloodwork to make sure your dose of Aromasin is enough. I usually recommned 12.5mg every other day for 500mg/test and then at the 5 week mark you can see if your estrogen is too low and adjust down or up if needed.
If you are not estrogen prone, run bloods, and take an AI like aromasin your worries of gyno should be minimal.