Before you spend out on different chai rings and sprockets, have you considered borrowing a geared bike to try lots of different ratios on one ride?
Try your usual favourite few rides on a geared bike and make a note of what hills "require" what ratio for you to be comfortable. Also try on the flat at your comfortable cadence, or the speed you want to cruise at and note what gearing so you use there. Then try going up a hill on your "flat" gear ratio, and try a flat ride in your "hilly" ratio. You can then decide on your favoured chainring:sprocket ratio and pick a best fit
My preferred ratio for "regular" cycling in East Anglia is 48:18. With this I can cruise all day at 18-19mph (but spin out on the flat at 21-22mph) and get up the few short, sharp hills that we get here. In the shed I have a 17t sprocket, a 42t chainring and 2 spare chains. If I know my ride will be particularly flat I swap in the 17t sprocket and my shorter chain. If I am travelling to a more hilly area I put on my 42t chainring and shortest chain.
Gearing on SS is always a compromise, a best fit. There will always be one hill that beats you, or headwind that is just too much, or a flat where you always spin out. However, this is usually for about 2% of your riding. The more you get used to SS riding style and the fitter/stronger you get, the easier you'll find it!
J