Conference dresscode

hi! i just started law school and i have my first conference in 2 weeks. the dresscode is "blazer suggested but not required". truly, i don't think i can buy a blazer before the conference because of money and time, so i'm looking for advice and suggestions about what to wear!

i had this inspirations but i'm really not sure, any help is appreciated!

i'm planning on wearing high heeled boots and i have no issue with heels.