When I set a password on my Bitcoin Core and forgot it, I tried to remember it for several hours, but then I gave up and deleted this wallet, ...
It doesn't make any sense to delete the wallet as 1) you may remember your password suddenly (human memory is sometimes like that),
2) if your wallet password wasn't too complex it might be possible to crack it, especially if you remember parts of it (there are lots of tools for that, hashcat is one of them)
3) it's almost always a mistake to not write down a freshly invented password, even if you only tweaked your personal favorite password somehow for your wallet (or whatever password creation procedures you use; humans are usually terribly bad to create good passwords)
... then installed a mobile Trust Wallet that gives more functionality. And I screened 12 words and now my wallet is the most secure, although it is empty
Did you make a screenshot of your 12 mnemonic words of your Trust wallet, a digital copy of it on a internet connected mobile device?
Terribly wrong procedure and good look with the security of your wallet in the future. Oh, don't cry later should it get suddenly emptied after you put some funds into your mobile Trust wallet. (If you made a screenshot it likely got already distributed to some cloud services who do unknown picture screening by their so-called picture recognition tools to identify picture content, tag pictures, you name it...
