Is my idea good or am I kidding myself?

Hi all, I’m new here. I’ve always wanted to solve a problem by building an app. The problem was I wasn’t a good coder and didn’t know anyone to help me. With the exponential growth of AI it was finally possible for me to fill the holes I wasn’t capable of filling on my own. Great! I’m from Melbourne, Australia, and I don’t know if you’ve heard, but drinking coffee is big here. We are currently facing an issue as a coffee drinking society of rising prices and cost of living. Sometimes a basic small coffee can be over $6 a cup! So, I had the idea to build an app and list all the coffee prices in the proximity of me, so I can get the best value. After 3 months, that idea became reality and I launched my app. However, no traction :( Is my idea even good? Do people want this? I’m new to marketing as well so that’s clearly an issue. Help!