Hi,
I still had some bitcoins on an old bitcoin core wallet.
What is the best procedure to obtain bitcoin cash, I would really apprecciate some suggestions, as I am very worried to screw it up

Can I just install another wallet and transfer it to it, so I have on one wallet bitcoin core and on the other wallet bitcoin cash ?
Thanks !
first of all you need to have a wallet that hold bitcoin before the fork and all the way up to the fork, otherwise it's not possible, you get an empty wallet if you import to bitcoin cash, then you just do, dumpprivatekey and import to bitcoin cash with importprivatekey command
Thanks. Of course there were some bitcoins in the wallet

I moved them on the 2nd of August to another wallet.
I used many different addresses and tried to figure out the privatkey. I all tried them, but unfortunately Coinomi keeps telling me "The private key does not contain any funds".
I checked every address manually, and it shows me that three different addresses contain 0.416 BCH this is also very strange as I had way more bitcoins in my wallet.

Is there maybe another way, that I copy the wallet.dat in a Bitcoin Cash wallet or something else?