Hello! Try a simple config at first (the following is only for connecting from localhost, if your WordPress is elsewhere, change the IP):

server=1
rpcallowip=127.0.0.1/8
rpcbind=127.0.0.1
rpcport=8332
rpcuser=foo
rpcpassword=bar

If this works, then you can expand on it.

If you tell me what error you are encountering, perhaps I can help. You can also get general help on bitcoin core installation at: bitcoin.stackexchange.com

Hope you have a happy new year 2024!

with regards