I just started a warehouse job where I sweat before even starting my work. I got these lightweight pants from Amazon that I’ll link below and I just wear them with a t shirt but I want to get some t shirts with more of an athletic material for breathability. Most of the women I work with wear leggings and a t shirt.

G Gradual Women's Pants with Deep Pockets 7/8 Stretch Sweatpants for Women Athletic, Golf, Lounge, Work https://www.amazon.com/dp/B08LBG6G3L/ref=cm_sw_r_cp_api_glt_fabc_RRYN9HJEY2DW0YARA06H?_encoding=UTF8&psc=1

Edit to say that I think linen would be uncomfortable if you were moving a lot. My job requires pretty much constant exercise so I basically dress for as if I’m doing a workout. The pants I linked are like a light, cheap-ish feeling legging fabric but a little looser. I don’t mind that they don’t seem like amazing quality because I wouldn’t want to get anything expensive ruined at work.