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I have a corner style shower setup, much like the one shown below, except mine has a heavier base, with about a 5" stepover. It was installed at a very reasonable price, by a plumber friend of my son. I had it installed several years ago, when my wife needed it. Now that she is gone, I still appreciate it over the tub shower for the same reasons .
Mine is a fiberglass wall panels, with what I believe to be a plastic base. The plumber had much experience with them and had confidence in this one.
I do have a tubular D-handle type grip just outside the door and another inside to the right of the shower adjust handle, which works well... since I can hold the inside, right handle with one hand, while my left hand reaches for the outside handle.
You and I share a situation... Being alone now, we don't put near as much pressure on any shower facility as a family of 5 or 6 people would do.
BTW: I disagree with the idea that GBO is a hunt-fish-shoot forum only. My goodness, we have here, forms on trapping, religion, bikes and many subjects... Mrs. GBO even has a genealogy forum..and I say GREAT !
If there is any form I don't like...I just don't go there. ..However, we do have thousands of mostly life-experienced people here. I like to hear from those who are more familiar with areas I am interested in..we can learn SOMETHING from almost everyone.