I think the simplest way, and it has always worked well for me, it to use an external Time Machine (or clone backup) disk. It's as simple as connecting an external drive and you will also have a good external backup just in case something goes awry. You can even inherit that backup drive and continue to use it on the new Mac.
If you prefer connecting the two Macs, I would use ethernet (which supports fast speeds, is very reliable, but may require an adaptor or adaptors).
I would stay away from the wireless transfer because it will be less reliable and likely significantly slower. You can use target mode but I prefer the external backup drive method over target mode or any direct connection between the two computers because should something crash or there be a power failure while migrating to the new computer (which is the longest stage).
https://support.apple.com/guide/macbook-pro/transfer-your-data-apda75cd668e/2019/mac/10.14.5
https://support.apple.com/en-us/HT204350
https://support.apple.com/guide/macbook-pro/transfer-your-data-apda75cd668e/2019/mac/10.14.5
