Which options should I choose for belt loop size, style, cant, guard or no guard...if I've never bought an IWB holster before?

On this holster company website, I have no idea which features and measurements I should select. Like Cant, and belt loop Inches size and material, guard or none?link below I have never bought a holster before, not IWB for carry.https://ift.tt/31Ym9oP via /r/CCW https://ift.tt/2PFzyjj