How to make my legs look slimmer?

So I got invited to this party type thing on Friday by my friend. It's a BBQ pool garden thing. I'm definitely not going to swim, or wear a bikini hahahaha. I am around 170-175 cm in height, and my legs are quite short and stubby I think. I want to wear shorts or maybe even a skirt (gasp!) but I really really hate my legs. Obviously I'd shave, exfoliate, then moisturize and put some gradual fake tan on (fake tan makes legs look better) but are there any tricks to make my legs look slimmer and longer? I'd really appreciate proper advice, no joking around or 'you need to just be confident' stuff. Thank you so much! ~L xx