18ftm How do I flirt with trans girls my age without looking like a creepy ass man

I mean I don’t look creepy but every time I see a cute trans girl in public I don’t know what to say or do. I don’t want to be one of “those” guys so I don’t do anything and it’s been like this for years. I CANT TAKE IT ANYMORE is what I’ve decided, so please give me advice and let me know what you wish men like me would say to you.