These numbers are really low, but some tests are missing. SHBG is another important one and should dictate a plan of action when it's time to start TRT. If you were to start TRT with an infrequent dosing schedule, estrogen would likely become a problem because of your high body fat percentage.
The Roche ECLIA methodology estrogen testing is not sensitive enough and picks up on other steroids and falsely elevates estrogen, the sensitive method (LC/MS/MS) doesn't have these limitations.
Your estrogen is on the low side, I had low estrogen when I was diagnosed with low testosterone, but that soon changed when I went on an inappropriate protocol and now estrogen was at 70, double the reference ranges and my high body fat had a lot to do with it.
I want to add that if SHBG is really low, an estrogen of 15 may not be as bad as it looks on paper because having low SHBG usually means a high free estrogen which allows you to get away with a lower estrogen value.