Here is a list of more faucets^[1] you can use to get a free testnet coins. Basically, testnet coins are for developers to make sure that the system works effectively before trying it on the mainnet network, so if you are not a developer, understanding how BTC works is not complicated.
If you want to use it to learn trading and other things, please advise the following simulation software^[2][3].

[1] https://bitcointalk.org/index.php?topic=5237763.msg54153134#msg54153134
[2] https://niffler.co/
[3] https://bitcoinflip.app/