First of all, do not select the LPC-Link2 as your board - the board selection is your target MCU, not your debug probe!! The debug probe will be automatically detected when you start a debug session for the first time (from the Quickstart Panel).
Anyway, for starting development for LPC54114, I would recommend that you download the MCUXpresso SDK for this device / for the LPCXpresso54114. The overview videos in this community may help you with getting started:
But for more details, please see the supplied MCUXpresso IDE User Guide.
Regards,
MCUXpresso IDE Support