If you were in my situation, what would you try next?
After finding your Bitcoin addresses and see it's balance on blockexplorer, there are 2 options,
1. Wait until Bitcoin Core is fully synced, but only if you're willing to download 350+ GB of blockchain files and waiting some for time (depending on your internet and hardware speed).
2. Obtain private key of your wallet and import/sweep the private key on lightweight wallet (such as Electrum).