Ubiquiti And VPN Clients

I have for some time wanted to learn about the different VPN services offered by AWS. Having invested some money into a full Unifi setup I thought that it would be a good idea to setup an AWS Site-to-Site VPN and AWS Client VPN connection between my lab network and my AWS account. I struggled for some time, messing around with the settings trying to get my USG to connect to the VPN server but it would not work. I probably wasted a couple of days of my free time pulling my hair out not really understanding why it wouldn’t connect.