#1. I fixed it for you, please go to Products -> Category Edit -> Display type -> Products: https://prnt.sc/1076io3
#2, 3. You only need to choose 1 main category for the product, no need to choose its parent category: https://prnt.sc/1076pk5
#4. Your mean that change this title: https://prnt.sc/1076rle
#5. Please go to Appearancer -> Widgets -> Woocommerce Shop -> Edit widget: https://prnt.sc/1076sss
#6, 7, 8. I fixed it for you
Please recheck and let me know if you need to help.