The whole process looks a bit complicated for Bitcoin Core. It's more common for its users to keep the wallet online in order to have all the (latest) blocks downloaded. Consider choosing Electrum instead, it will be much easier for you. No commands involved.

I've been in the same situation before. The password is fine, but the problem comes from a corrupt file, a corrupt file.

我们计划着同样的事情 希望通过免费的方式让更多的人参与。

In my opinion the best thing is to hold your bitcoin because for now the price is slowly recover.
Holding ether and bitcoin is a good for a long term for you to get a good profit.