Free T

I just had my labs done. My total test is 1006 but free test is only 100 and SHBG is 99. I am going to add boron to my daily vitamins. Already taking zinc magnesium and D. What else should I do to lower SHBG and increase free T?
Background : not on TRT currently. Had T checked at Dr and Dr said I was very high (only tested total T) so I had my labs done. I am 43 6’1” 165 lbs I don’t want to mess up my bodies natural T production but would like to optimize free T.