@Smetry I don't see what you're expecting to feel from TRT?
Increased Mood?
Increased Confidence?
Less indecision?
Physical strength?
Personally I did notice some physical side effects very quickly with TRT- eg strength increased, better erection quality.
The mental changes I think are very subtle and take time like JohnDoe said. After 3 months I can't attribute any specific mental feeling directly to TRT.
But the changes I've made to my habits since beginning TRT to improve my health like exercising more regularly, eating better, monitoring other health markers have put me in a much better mental state with a more positive outlook, and improved my overall confidence.
I think a lot of these things become self reinforcing - TRT might just have given me some motivation, I'm not sure.
I'm sure low dopamine levels won't leave you feeling well, TRT or not. But I think worrying about it is pointless as you can't measure it. Focus on the variables you can change and give it some time.