Hey,
Even before T I was always hairy , butt, back, tummy, chest you name it. I let it grow except the private area and I also trim my pitt hair because I find it is easier to keep stink free. Sometimes I trim down my stomach hair with an electric razor or sometimes I will shave it with a shaver so it's smooth but it sucks when it grows in. Now on what you should to with it, kind of depends on what you want. Do you want it gone? If so I would suggest nair or something like that to remove it without getting razor burn and it will last way longer. If you don't want it all gone you could just trim it down with an electric razor so that its shorter but not all the way gone.