Congratulations, as well. Nice gains with more to come.
I’m not a doc, but do believe that taking testosterone is inferior to producing more yourself for the reasons you’ve stated and others. Your levels are normal, so producing (and/or freeing) a little more might get the effects you are after. There are ways to improve your production and ratio of free testosterone. Testicular massage, in addition to penis focused efforts likely helps as testosterone is produced in the leydig cells there. I have found high quality Tongkat Ali to be very effective as well. I’m 42 and have noticed the drop in the last few years. I did the above and have achieved great results.