I often stand up when steering mine and rest my other arm on the dodger or lean on the dodger facing forward with the tiller between my legs
I think if you have a tiller it is an advantage to have it long so you can hide under the dodger if the weather is bad and one that will pivot up so it always falls to hand regardless of whether you are sitting or standing
I went for a sail on another Sailmaster a couple of years ago with a short fixed height tiller and found it difficult to get comfortable
On mine when sailing with crew it works best if the person steering is in the front of the cockpit and the person on the sheet winches is behind
Regards Don