I have not heard of anyone even getting gyno symptoms from tren alone at 100mg ed inj. For starters, 75mg EOD or half that ed is prolly a good place to start. Its fast acting so if you get signs, just stop taking tren and you should be safe.
Also note, if you dont have access to any other gear, that leads me to believe you cant get clomid either. If you cant get the proper products for when comming off cycle, then dont use gear at all.