Follow all the instructions step by step

When you open HexChat for the first time, it shows a screen with network connections.
Add the ChkNET network with the string, which means your connection to our network will be encrypted by using the SSL port 6697.
Follow the actions enumerated by red numbers shown on the images.

Finally. You are connected to our network, congratulations!

If you don't like HexChat's default color set (black text on a white background), you can invert these colors:

Also you can disable join/part/nick change messages:

And enjoy the final variant: