This is a great starting point. Being a junior dev is totally fine — Claude will handle most of the hard parts. What you should focus on is broadening your technical breadth, not depth. And the fastest way to expand your knowledge base is to start from a project you actually care about. Nothing beats that.

PostgreSQL is a great database — I use it too, and I'd recommend it.

I wouldn't suggest Java though — it's too resource-heavy. If you have really good server resources, maybe consider it. But I'd recommend Rust instead. Don't be afraid — Claude will write most of the code for you. You just need to know how to debug.

As for Redis, you probably don't need it at the early stage. Only worry about it when your app has a lot of users — by then you'll naturally figure out how to use it.

One more thing: write detailed API documentation first. Everything should revolve around the docs. Don't rush into writing code. Trust me, documentation matters more than code.

Good luck, and go for it!