Definitely wear a covering for your nose and mouth. My sister bought me one in Korea that filters a lot of smog and it’s cute!

I’m not sure how great the filtering is with a cloth mask, but it’s better than nothing: https://www.amazon.com/dp/B078S5YT6R/ref=cm_sw_r_cp_api_i_B3dgDbT0T5BNT

This one seems pretty heavy duty: https://www.amazon.com/dp/B07DS2V82Q/ref=cm_sw_r_cp_api_i_60dgDbR07JDV6

Amazon has tons of options :)