For a harness, there are a lot of choices available, so it will probably depend on how much you are willing to spend. If you are unsure if pegging is something you will continue doing, you might want to try something like the
Latigo Leather Harness. It is lower priced and you can change the O-ring size for when you progress to larger dildos. We have the
Spareparts Joque Harness which is more expensive also a quality product. It is very comfortable to wear, adjustable, and has a flexible O-ring that stretches to accommodate dildos up to a diameter of 2". A good option you should consider is the
Curve Kit. I believe it combines the Latigo Leather Harness with the Tantus Curve dildo. The Curve is a great dildo for pegging. At 1-3/8" diameter, it's just slightly bigger than your Holt. It also has a nice big base for stability in the harness, has a curve for P-spot targeting, and is made of silicone. It's also a great dildo for g-spot targeting. I hope that helps. Feel free to message me if you have any other questions.