Ethernet is easy to set up on your Amiga. A customer has made a 6 minute video of the installation process which you can use as a tutorial.
Buy the card here:
You can download all of the software used in this video here:
http://pastebin.com/GFPhM6Tm (Cnet16 file /RoadShow settings)
AmiFTP setup as well as cardctl and card reset is described in more detail here if necessary: https://retroready.one/blogs/news/amiga-600-1200-and-wpa2-aes-networking
Enjoy networking on your Amiga!