Advice for a Beginner

I just joined this reddit page today. I am going into my junior year of college, and I will be living in an apartment for the first time this next year. I am hoping to get some advice on how to save money and start couponing.

I have a lot of the apps that show up on TikTok, such as fetch, ibotta, etc. I was hoping I can get help on how to stack, get paper coupons and any other important info. I really want to become good at this and learn to become a responsible adult.