We need recommendation for back end project practice

We are a team of classmates who are looking for a project to do it together, that is already there to follow. yes, we are looking for copy and paste project at this level.
We will fake it first till we make it a strategy.
we are looking to practice the following:
Python and SQL Dev Up Including ducker, and Kubernetes.
Of course addition to some of the front-end Skills but not heavy, the main focus is on the back end.
we are a team of 3-5 so far, so maybe we need good size project to follow.
You might think why we are asking while there are many projects out there to pick from, just pick one.
True we can pick any project, but I guess that someone already went into that path before us, and must have good ideas and suggestions.
Thank you In advance