You will find that if you enjoy blending soaps as part of this hobby that, like me, your approach will evolve over time. When I returned to DE shaving 4+ years ago I started with just Williams Shave Soap that was sold in my local supermarket. Good lather but a lot of effort to build the lather with the poor quality brushes I started with. Next I tried Van Der Hagen Deluxe from a local drug store and found that while it was easy to lather it had no where near the slickness of Williams. This gave me the idea of blending the two (learned later I wasn't the first person to create a Van Der Williams soap) with the result delivering an easy to lather puck and great slickness.These are some good mixes. The only other mixing I have tried is to mix the Stirling Unscented Beeswax with Arko, Cella, other Stirling soaps, WTP, and some others that I wanted to be better. The beeswax really is a good performer and a good replacement for lanolin.
Looking at some of those above, maybe I need to get more creative with my mixing.
My experimentation evolved from there with the addition of small amounts of bath soap (Ivory for more slickness, Dove to superlather) and Proraso for enhanced lathering ease. Later added some Arko in place of some of the Williams that was discontinued. I even experimented with pure bath soap blend of Ivory (lather of Ivory alone, while slick dissipates) and Dove Men+Care (Dove lathers incredibly easy but by itself is almost too thick) and created a reasonably good shaving soap with these two ingredients. Did consign that last one back to bath soap use as I've so many other shaving soap options with better performance though the blend would be perfectly fine for someone on a budget.
Recommend you look at the many threads here on blending and then experiment to figure out what you like the best.