I don't think you have enough room for a tub and a separate shower unless you start congesting the place and end up with disproportionate shower size etc.

But you can make a nice and comfortable bathroom here is a simple layout to give you an idea, the rest you can spice it up with wall to ceiling tiles, 3d wall surface, etc.

i was afraid of that, and love the way you did the above desings, but could you show me something anyway with both and only a single sink, I would really appreciate it as this is driving me nuts trying to figure it out. I just dont like the shower and tub look, TIA