idk what you already have and lordt knows I am not the one to be giving fashion advice, let alone for something this fancy ass, but: I am a big fan of black slacks, a blouse (preferably white but also I'm boring), black jacket (like... a blazer? idk I'm bad at what all this shit is called), and nice black flats or a modest heel of you can walk in them without looking like a freshly birthed giraffe (self call-out). hair up in some kind of neat updo. low bun?Right? And this is me already overthinking everything. Do I go full powersuit but would that make me look too aggressive, a skirt suit with a nice blouse, but it would show my leg tattoo and not be taken seriously, how do I wear my hair, etc etc etc.
God being female is a pain in the ass.
if you want to wear a skirt, you can wear opaque tights to hide the tattoo but I think it'd be tough to get a good color combo that's still "appropriate" (like... black tights and black skirt is too much black/weird, but color tights would be weird and a colored/patterned skirt with black tights might look weird). there are also some makeup things made specifically for covering tattoos if that's a route you'd want to try.
uh this probably maybe wasn't helpful except I guess maybe to say hey, you're not alone in wondering wtf to wear for this kinda shit, I just never have to go anywhere that fancy