Making a Point & Click game like Sam & Max

I’m very new to unreal and have only ever made games on Unity, part of my uni course asks me to make a game on Unreal that follows certain guidelines and metrics to meet the grade mark.

The best way to reach this mark is making a game like Sam & Max functionality wise, I can’t find any guides on how to create point-and-click games or the required interactions for a game of the sort that aren’t asking for me to buy their $300 plugin.

Does anyone have any advice or pointers for me?