Welcome
@Ritchboy. Either E or C will work fine and at 250-500mg sounds great for a first cycle. No one should give you a gtg. We just don’t do that and if someone does you probably shouldn’t trust it. I will give you this bit of information that should help with your decision though. Go to Symbiotic’s last post (one page back) and in his paste pin you will see where both testC and testE have been tested in powder and then again in finished form.
Edit: Didn’t realize it was your first and only post. Go to the new member section and introduce yourself. Otherwise you won’t get helpful replies like I just gave you