You might want to consider flipping your door so that it will open and swing against the wall which should work better for you. Or, you could use a pocket or barn door which would give you more wall space.

It's a bit hard to tell, it looks like some of the proportions are not correct. Given what you have drawn it looks like entering and exiting your shower is going to be awkward. I'm not certain that you'll be able to open the door all the way because of the placement of the tub and vanity.
Here are a few suggestions:
Ditch the corner tub, and use a rectangular one that is installed with the long end on the wall opposite the vanity and shower and install the toilet next to the tub.
Slide the door to the right, and you'll be able to have a larger vanity and/or shower. If you can use a pocket door or something of the like you'll gain wall space like sandpat mentioned.
I don't see any storage planned. Have you thought about where you'll keep towels, toiletries, etc-?

Here is my idea. Do you have a wdw in this space?

Thank you all for the great ideas but what's wp stand for? yes, I have a window in the wall opposite to the door. Of course, I would need storage for the towels, shampoo, cleaners. .etc. But I left the planning of that part until I get the arrangement of main components out of the way (though I like the idea of having the linens shelf next to the vanity). The swing of the door in the original plan is to the left, but I thought making it the opposite direction will hide the toilet and make the bathroom look better (I'm not sure if you agree). But the barn door is not an option in my case because it's not popular here and most likely it'll be difficult to find a contractor who can install it. Once again thank you all for your ideas and anymore will be welcomed.

BTW I changed my mind regarding the corner jacuzzi; I'll have a rectangular one or even just a tub.

WP stands for whirlpool, but it could be a regular or air tub.