OP I’ve been many many times for work.
I feel so much safer there than in UK. No drunks, no on street harassment, much lower crime, etc. You’re safer with a Dubai police officer than you are with a British police officer, sadly.
The only big must do is do not kiss or even touch a man (even husband) in public. You can get arrested for public kissing, to them it’s a bit like flashing your genitals at passers by.
Anything you wear in UK is also acceptable anywhere in Dubai, I mostly wore shorts and t shirt or a knee length dress. If you want to cover up, buy a pashmina out there, you can buy silk or cashmere for what you’d pay for polyester in the UK. The shopping there is fantastic, don’t buy much before you go, just go the mall out there.
Yes it has human rights issues but that will not affect you, and there are very few countries in the world with perfect human rights records.
Have fun and say hi to the waterpark for me.