a ton of usefuls plash art and textures, some of it just requires attribution https://www.freepik.com/home
A russian fonts resource that I personally like, can be used for english as well. https://fonts-online.ru/search
Another fonts site, now in english https://www.fontsquirrel.com/
Public domain art? just google any engravings of 19 century or earlier and remove a watermark if there is one, they are public domain anyway. Or find something on https://liberart.online/ with attribution