Kissing?

I have my first girlfriend and god is she gorgeous and smart and funny and kind and absolutely amazing. I cant think about her without breaking out into a big toothy smile. Her birthday is coming up and I wanted to surprise her with a kiss (maybe? Idk I get so nervous about even touching her) we've talked about it and we definitely want to kiss but... I dont know how 😅 she's my first significant other. My dad has told me that instinct will basically guide me on how to kiss when it happens but idk, I wanted a few more opinions to see if I could maybe get some advice that would make me a little more confident about it 😅 any help to offer?