Here is how I suggest.
( I don't know your history on cycles)
But,
Get pre cycle bloods.
Do not take any anti estrogen for 3-4 weeks while you start your cycle.
At week 4-5 gets bloods and see where your estrogen is compared to your pre cycle bloods.
If the estrogen is elevated at a super high level then start with a small dosage for a week or two weeks. Then get more bloods and see how that dosage is affecting your e2. Once you dial this in you will know on every cycle how the aromisin affects your body.
But the key is to get blood blood blood until you get it dialed in if you are new to this. Don't guess.
Edit: if in the first 3-4 weeks you are experiencing estrogen sides, get blood and see where it's at. Then start a small dose of aromisin then get more bloods