First, welcome fellow Wisconsinite. I'm just down the road an hour or so to the west. While the 158 gr XTPs are not the best for SD/HD when used at .38 special velocities, you will find them very accurate, very easy to reload and a wealth of reloading information for them. Expansion and terminal performance are secondary to accuracy and reliability anyway. Hit a BG in COM and he won't care how much expansion you get. As you get more experienced with reloading, you will automatically expand your bullet selections, but for a newby, jacketed bullets are the easiest to have good success with.
As for recipes using the 158 gr XTP and PP in .38, Lyman shows 4.3-4.8gr for standard 4.8-5.3gr for +p. Hornady shows 4.4-5.7gr for standard and 5.7-6.0gr for +p. Both used SP primers. Be sure to double check these recipes with another reference before using. Never take any internet forum poster loads as gospel....even mine.