Not much for criteria to go on. How do you want to carry it - IWB, OWB, AIWB...? There are several possibilities.
If this is your first carry and you want IWB, perhaps get a remora or sticky holster so you can get familiar with the location, cant and ride height that works for you. While the Shield is quite thin and easier than most to carry, don't neglect getting a decent belt, too.
Once you have that information you can get something that mimics that set up in another holster, be it in kydex, leather or a hybrid.
Good luck