Before focusing on funds, get the basics down first. Today, we're talking about testnet interactions.
During the testnet phase, things like data resets and unstable nodes are common. These are normal.
It's best to use a dedicated wallet for testnets, rather than sharing one with the wallet that holds your main assets.
ETH on a testnet is just test currency; it's not the same as $ETH on the mainnet.

#ETH