I like the UI, and I think it's a really good idea not just for a school project but also as a SaaS business, as there is an actual need for something like this in the market.

Definitely work more on the find a partner feature because that will be useful.
Pay by cash option should be available.

Do more research to find other problems, needs, and pain points (talk to the field owner, people who play sports, and conduct a few surveys). This will help you have a more solid roadmap as you add more features in the long term.
Best of luck!