Hei straight razor shavers!

I'm new to straight razor shaving, having used Gillette disposables my whole life. Recently I decided to make the shift from disposable culture to reusable in an effort to reduce my own plastic trash consumption. On a whim I bought two cheap Selective brand razors and a strop for 19 bucks. I know, a poor brand of razor but it can't be too bad for learning can it?
My first shave was a relative success with only a minor nick on the leg from impatience and a thin lather.
Sharpening it was easy and took only seconds. The lather was a honey-oat lather from a liquified soap bar that I rather like. Before this I had also shaved with mahogany obsidian, plain obsidian, flint and chert but no stone, of course, keeps its edge and shape as long as steel does, naturally.

So I hope I'm welcome here and my question is how does one create a thick lather that wont just run off and how does one shave legs without a bathtub. We only have a shower stall and straight razor shaving standing upright may be impossible and I haven't even moved to shaving armpits yet, I'm still using a disposable headed safety razor for that.

Any advice? Thanks!