Sorry for not answering earlier, but I have been away for a while.
It looks like no one else stepped up in the meantime.
.There should be no difference in difficulty starting up with CarloopBluetooth or CarloopBasic.
Any of the regular Carloop apps (which do not use Bluetooth functionality) will run just the same way on a CarloopBluetooth. The Bluetooth capability is extra and does not take away from anything else. However, it will take some work on your part to program the Bluetooth functions you would like to have.
If you take a look at the Hardware design of Carloop (it is Carloop version 2.3 on GitHub), you will see that it uses four connections on the OBD2 port. You missed +12V and signal GND. The chassis GND does not matter; it might even be better to leave this one disconnected.
Watch out for the power supply requirement. J1939 is often used with heavy machinery like diesel trucks, bulldozers, etc. which often run on +24V instead of +12V. Carloop was designed for +12V, but +24V is too much for Carloop and will damage it.
If your aftermarket ECU allows it, you could even get more advanced with Carloop and use it to change PIDs to control your equipment.