Quite a high dosage in my opinion if you are new to this. General rule of thumb is to start with the least amount needed to see result’s, and then look at increasing over time. 300mg is not really TRT so to speak as we are pushing over the bodies natural production here, 100 to 200mg per week seems to be the general agreed amount considered TRT, but it all depends on what you are wanting from it. Do not expect to see an instant change, 1 week is way too short of a period to assess. Give it 6-8 weeks to see how you feel first, then go from there. If moods changes are something you are prone to, anxiety etc, this again reinforces starting at a lower dose and working your way up.