Seeking advice: Girl out of my sexual league

Hello, I am hoping to get some fast advice for an encounter happening tomorrow evening.
I have been talking (includes text, email, and phone) with a girl who, as our talk has gotten more intimate, I am finding is out of my league sexually. I don't know if it is in terms of experience, but it is in terms of her confidence. She is fully submissive and wants/loves/craves to be choked, used, and ****ed hard, and be my slut. Our phone sex has been fairly graphic, and to generalize, I can do anything, anywhere, and the more I use her and don't ask for permission, the better. Including some degree of pain.
It is exceptionally hot and I want to dominate her, but I am not used to this. And although I've been able to steel myself up and will be as confident and ready to dominate as I can humanly possibly be, it would really help me if people here could give me some advice on what to do with a girl like this.
Here are a couple specific questions:- What do I do when she opens her hotel room? Should I have brought flowers or a drink?- Does it matter what I wear? I would feel more comfortable in a shirt and jeans and due to my body I think I look better in that type of outfit than I do in my work suit and tie... so, shirt and jeans, or stay with the more polished suit and tie?
But beyond that, I would really greatly appreciate any advice in general, and would love to know what has worked for you with submissive girls.
Thank you,Jeffrey L.

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